64292255478 has 24 divisors (see below), whose sum is σ = 151963513416. Its totient is φ = 19482501600.

The previous prime is 64292255441. The next prime is 64292255479. The reversal of 64292255478 is 87455229246.

64292255478 is a `hidden beast` number, since 6 + 4 + 2 + 92 + 2 + 5 + 547 + 8 = 666.

It is a super-2 number, since 2×64292255478² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64292255479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162353983 + ... + 162354378.

It is an arithmetic number, because the mean of its divisors is an integer number (6331813059).

Almost surely, 2^64292255478 is an apocalyptic number.

64292255478 is an abundant number, since it is smaller than the sum of its proper divisors (87671257938).

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

64292255478 is a wasteful number, since it uses less digits than its factorization.

64292255478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324708380 (or 324708377 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 64292255478 in words is "sixty-four billion, two hundred ninety-two million, two hundred fifty-five thousand, four hundred seventy-eight".