31772777040 has 80 divisors (see below), whose sum is σ = 109439572800. Its totient is φ = 8472739968.

The previous prime is 31772776993. The next prime is 31772777059. The reversal of 31772777040 is 4077727713.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7352650 + ... + 7356969.

It is an arithmetic number, because the mean of its divisors is an integer number (1367994660).

Almost surely, 2^31772777040 is an apocalyptic number.

31772777040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31772777040 is an abundant number, since it is smaller than the sum of its proper divisors (77666795760).

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

31772777040 is a wasteful number, since it uses less digits than its factorization.

31772777040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14709641 (or 14709629 counting only the distinct ones).

The product of its (nonzero) digits is 403368, while the sum is 45.

The spelling of 31772777040 in words is "thirty-one billion, seven hundred seventy-two million, seven hundred seventy-seven thousand, forty".