64556451653332 has 6 divisors (see below), whose sum is σ = 112973790393338. Its totient is φ = 32278225826664.

The previous prime is 64556451653303. The next prime is 64556451653339. The reversal of 64556451653332 is 23335615465546.

It can be written as a sum of positive squares in only one way, i.e., 64258757016336 + 297694636996 = 8016156^2 + 545614^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64556451653339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069556456663 + ... + 8069556456670.

Almost surely, 2^{64556451653332} is an apocalyptic number.

It is an amenable number.

64556451653332 is a deficient number, since it is larger than the sum of its proper divisors (48417338740006).

64556451653332 is a wasteful number, since it uses less digits than its factorization.

64556451653332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16139112913337 (or 16139112913335 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 58.

The spelling of 64556451653332 in words is "sixty-four trillion, five hundred fifty-six billion, four hundred fifty-one million, six hundred fifty-three thousand, three hundred thirty-two".