64961156352 has 72 divisors (see below), whose sum is σ = 173857652640. Its totient is φ = 21532702720.

The previous prime is 64961156321. The next prime is 64961156353. The reversal of 64961156352 is 25365116946.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64961156353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98799 + ... + 373742.

It is an arithmetic number, because the mean of its divisors is an integer number (2414689620).

Almost surely, 2^64961156352 is an apocalyptic number.

It is an amenable number.

64961156352 is an abundant number, since it is smaller than the sum of its proper divisors (108896496288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64961156352 is a wasteful number, since it uses less digits than its factorization.

64961156352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472739 (or 472725 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 48.

The spelling of 64961156352 in words is "sixty-four billion, nine hundred sixty-one million, one hundred fifty-six thousand, three hundred fifty-two".