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64316712725021 = 105161195730471
BaseRepresentation
bin11101001111110111001101…
…10100001010101000011101
322102201121200021221122101002
432213323212310022220131
531412231111424200041
6344442405005200045
716355505045615101
oct1647734664125035
9272647607848332
1064316712725021
1119547623666709
127269014b60025
1329b7069b05113
1411c4d34677901
1576805a59a59b
hex3a7ee6d0aa1d

64316712725021 has 4 divisors (see below), whose sum is σ = 64377908456544. Its totient is φ = 64255516993500.

The previous prime is 64316712725009. The next prime is 64316712725063. The reversal of 64316712725021 is 12052721761346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64316712725021 - 222 = 64316708530717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64316712725071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30597864185 + ... + 30597866286.

It is an arithmetic number, because the mean of its divisors is an integer number (16094477114136).

Almost surely, 264316712725021 is an apocalyptic number.

It is an amenable number.

64316712725021 is a deficient number, since it is larger than the sum of its proper divisors (61195731523).

64316712725021 is a wasteful number, since it uses less digits than its factorization.

64316712725021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61195731522.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 64316712725021 in words is "sixty-four trillion, three hundred sixteen billion, seven hundred twelve million, seven hundred twenty-five thousand, twenty-one".

Divisors: 1 1051 61195730471 64316712725021