64154171688 has 32 divisors (see below), whose sum is σ = 168826768800. Its totient is φ = 20259211968.

The previous prime is 64154171687. The next prime is 64154171689. The reversal of 64154171688 is 88617145146.

It is an interprime number because it is at equal distance from previous prime (64154171687) and next prime (64154171689).

It is a self number, because there is not a number n which added to its sum of digits gives 64154171688.

It is not an unprimeable number, because it can be changed into a prime (64154171681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70344031 + ... + 70344942.

It is an arithmetic number, because the mean of its divisors is an integer number (5275836525).

Almost surely, 2^64154171688 is an apocalyptic number.

It is an amenable number.

64154171688 is an abundant number, since it is smaller than the sum of its proper divisors (104672597112).

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

64154171688 is a wasteful number, since it uses less digits than its factorization.

64154171688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140689001 (or 140688997 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The spelling of 64154171688 in words is "sixty-four billion, one hundred fifty-four million, one hundred seventy-one thousand, six hundred eighty-eight".