64638455602 has 16 divisors (see below), whose sum is σ = 110812896000. Its totient is φ = 27701166528.

The previous prime is 64638455597. The next prime is 64638455611. The reversal of 64638455602 is 20655483646.

It is a super-2 number, since 2×64638455602² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399399 + ... + 537397.

It is an arithmetic number, because the mean of its divisors is an integer number (6925806000).

Almost surely, 2^64638455602 is an apocalyptic number.

64638455602 is a deficient number, since it is larger than the sum of its proper divisors (46174440398).

64638455602 is a wasteful number, since it uses less digits than its factorization.

64638455602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171465.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 64638455602 in words is "sixty-four billion, six hundred thirty-eight million, four hundred fifty-five thousand, six hundred two".