31642641012 has 48 divisors (see below), whose sum is σ = 75802608000. Its totient is φ = 10267299840.

The previous prime is 31642640999. The next prime is 31642641013. The reversal of 31642641012 is 21014624613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31642641013) by changing a digit.

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, 149289 + ... + 292527.

It is an arithmetic number, because the mean of its divisors is an integer number (1579221000).

Almost surely, 2^31642641012 is an apocalyptic number.

It is an amenable number.

31642641012 is an abundant number, since it is smaller than the sum of its proper divisors (44159966988).

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

31642641012 is a wasteful number, since it uses less digits than its factorization.

31642641012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143736 (or 143734 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 31642641012 in words is "thirty-one billion, six hundred forty-two million, six hundred forty-one thousand, twelve".