64146779874 has 24 divisors (see below), whose sum is σ = 144132271920. Its totient is φ = 21382259796.

The previous prime is 64146779831. The next prime is 64146779911. The reversal of 64146779874 is 47897764146.

64146779874 is a `hidden beast` number, since 6 + 414 + 67 + 7 + 98 + 74 = 666.

It is a super-2 number, since 2×64146779874² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65994144 + ... + 65995115.

It is an arithmetic number, because the mean of its divisors is an integer number (6005511330).

Almost surely, 2^64146779874 is an apocalyptic number.

64146779874 is an abundant number, since it is smaller than the sum of its proper divisors (79985492046).

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

64146779874 is a wasteful number, since it uses less digits than its factorization.

64146779874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131989276 (or 131989264 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The spelling of 64146779874 in words is "sixty-four billion, one hundred forty-six million, seven hundred seventy-nine thousand, eight hundred seventy-four".