31423645621144 has 64 divisors (see below), whose sum is σ = 69662517350400. Its totient is φ = 13002105782400.

The previous prime is 31423645621133. The next prime is 31423645621169. The reversal of 31423645621144 is 44112654632413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31423645621094 and 31423645621103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26825049 + ... + 27971959.

It is an arithmetic number, because the mean of its divisors is an integer number (1088476833600).

Almost surely, 2^{31423645621144} is an apocalyptic number.

It is an amenable number.

31423645621144 is an abundant number, since it is smaller than the sum of its proper divisors (38238871729256).

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

31423645621144 is a wasteful number, since it uses less digits than its factorization.

31423645621144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163824 (or 1163820 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 46.

The spelling of 31423645621144 in words is "thirty-one trillion, four hundred twenty-three billion, six hundred forty-five million, six hundred twenty-one thousand, one hundred forty-four".