64961851533 has 8 divisors (see below), whose sum is σ = 86627309088. Its totient is φ = 43302147504.

The previous prime is 64961851481. The next prime is 64961851543. The reversal of 64961851533 is 33515816946.

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

It is not a de Polignac number, because 64961851533 - 2¹⁸ = 64961589389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64961851543) 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, 1411966 + ... + 1457247.

It is an arithmetic number, because the mean of its divisors is an integer number (10828413636).

Almost surely, 2^64961851533 is an apocalyptic number.

It is an amenable number.

64961851533 is a deficient number, since it is larger than the sum of its proper divisors (21665457555).

64961851533 is a wasteful number, since it uses less digits than its factorization.

64961851533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876763.

The product of its digits is 2332800, while the sum is 51.

The spelling of 64961851533 in words is "sixty-four billion, nine hundred sixty-one million, eight hundred fifty-one thousand, five hundred thirty-three".