64126657158 has 16 divisors (see below), whose sum is σ = 128475597360. Its totient is φ = 21338505216.

The previous prime is 64126657057. The next prime is 64126657159. The reversal of 64126657158 is 85175662146.

It is a happy number.

It is a super-2 number, since 2×64126657158² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64126657158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64126657159) 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, 9258043 + ... + 9264966.

It is an arithmetic number, because the mean of its divisors is an integer number (8029724835).

Almost surely, 2^64126657158 is an apocalyptic number.

64126657158 is an abundant number, since it is smaller than the sum of its proper divisors (64348940202).

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

64126657158 is a wasteful number, since it uses less digits than its factorization.

64126657158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18523591.

The product of its digits is 2419200, while the sum is 51.

The spelling of 64126657158 in words is "sixty-four billion, one hundred twenty-six million, six hundred fifty-seven thousand, one hundred fifty-eight".