64247704261 has 8 divisors (see below), whose sum is σ = 72831405920. Its totient is φ = 56184226992.

The previous prime is 64247704247. The next prime is 64247704307. The reversal of 64247704261 is 16240774246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64247704261 - 2⁵ = 64247704229 is a prime.

It is a super-2 number, since 2×64247704261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64247704061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130055835 + ... + 130056328.

It is an arithmetic number, because the mean of its divisors is an integer number (9103925740).

Almost surely, 2^64247704261 is an apocalyptic number.

It is an amenable number.

64247704261 is a deficient number, since it is larger than the sum of its proper divisors (8583701659).

64247704261 is a wasteful number, since it uses less digits than its factorization.

64247704261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260112195.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 64247704261 in words is "sixty-four billion, two hundred forty-seven million, seven hundred four thousand, two hundred sixty-one".