64154986965 has 24 divisors (see below), whose sum is σ = 111208462560. Its totient is φ = 34213997664.

The previous prime is 64154986871. The next prime is 64154986967. The reversal of 64154986965 is 56968945146.

64154986965 is a `hidden beast` number, since 6 + 4 + 1 + 549 + 86 + 9 + 6 + 5 = 666.

It is not a de Polignac number, because 64154986965 - 2¹¹ = 64154984917 is a prime.

It is a super-2 number, since 2×64154986965² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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 in 23 ways as a sum of consecutive naturals, for example, 1058574 + ... + 1117536.

It is an arithmetic number, because the mean of its divisors is an integer number (4633685940).

Almost surely, 2^64154986965 is an apocalyptic number.

It is an amenable number.

64154986965 is a deficient number, since it is larger than the sum of its proper divisors (47053475595).

64154986965 is a wasteful number, since it uses less digits than its factorization.

64154986965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83153 (or 83150 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 64154986965 in words is "sixty-four billion, one hundred fifty-four million, nine hundred eighty-six thousand, nine hundred sixty-five".