64154986964 has 6 divisors (see below), whose sum is σ = 112271227194. Its totient is φ = 32077493480.

The previous prime is 64154986871. The next prime is 64154986967. The reversal of 64154986964 is 46968945146.

It can be written as a sum of positive squares in only one way, i.e., 37179552400 + 26975434564 = 192820^2 + 164242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64154986897 and 64154986906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64154986967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019373367 + ... + 8019373374.

It is an arithmetic number, because the mean of its divisors is an integer number (18711871199).

Almost surely, 2^64154986964 is an apocalyptic number.

It is an amenable number.

64154986964 is a deficient number, since it is larger than the sum of its proper divisors (48116240230).

64154986964 is a wasteful number, since it uses less digits than its factorization.

64154986964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038746745 (or 16038746743 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 62.

The spelling of 64154986964 in words is "sixty-four billion, one hundred fifty-four million, nine hundred eighty-six thousand, nine hundred sixty-four".