31428577616 has 40 divisors (see below), whose sum is σ = 65054482080. Its totient is φ = 14665014144.

The previous prime is 31428577591. The next prime is 31428577639. The reversal of 31428577616 is 61677582413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751151 + ... + 791886.

It is an arithmetic number, because the mean of its divisors is an integer number (1626362052).

Almost surely, 2^31428577616 is an apocalyptic number.

It is an amenable number.

31428577616 is an abundant number, since it is smaller than the sum of its proper divisors (33625904464).

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

31428577616 is a wasteful number, since it uses less digits than its factorization.

31428577616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543131 (or 1543125 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The spelling of 31428577616 in words is "thirty-one billion, four hundred twenty-eight million, five hundred seventy-seven thousand, six hundred sixteen".