64172577740 has 12 divisors (see below), whose sum is σ = 134762413296. Its totient is φ = 25669031088.

The previous prime is 64172577737. The next prime is 64172577773. The reversal of 64172577740 is 4777527146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604314424 + ... + 1604314463.

It is an arithmetic number, because the mean of its divisors is an integer number (11230201108).

Almost surely, 2^64172577740 is an apocalyptic number.

It is an amenable number.

64172577740 is an abundant number, since it is smaller than the sum of its proper divisors (70589835556).

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

64172577740 is a wasteful number, since it uses less digits than its factorization.

64172577740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208628896 (or 3208628894 counting only the distinct ones).

The product of its (nonzero) digits is 2304960, while the sum is 50.

The spelling of 64172577740 in words is "sixty-four billion, one hundred seventy-two million, five hundred seventy-seven thousand, seven hundred forty".