64331631051345 has 96 divisors (see below), whose sum is σ = 133036703534592. Its totient is φ = 28117829431296.

The previous prime is 64331631051307. The next prime is 64331631051349. The reversal of 64331631051345 is 54315013613346.

It is a happy number.

64331631051345 is a `hidden beast` number, since 6 + 4 + 3 + 3 + 1 + 631 + 0 + 5 + 1 + 3 + 4 + 5 = 666.

It is not a de Polignac number, because 64331631051345 - 2¹¹ = 64331631049297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64331631051345.

It is not an unprimeable number, because it can be changed into a prime (64331631051349) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14676577 + ... + 18548993.

It is an arithmetic number, because the mean of its divisors is an integer number (1385798995152).

Almost surely, 2^{64331631051345} is an apocalyptic number.

It is an amenable number.

64331631051345 is an abundant number, since it is smaller than the sum of its proper divisors (68705072483247).

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

64331631051345 is a wasteful number, since it uses less digits than its factorization.

64331631051345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874751 (or 3874748 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 64331631051345 in words is "sixty-four trillion, three hundred thirty-one billion, six hundred thirty-one million, fifty-one thousand, three hundred forty-five".