31604551555545 has 48 divisors (see below), whose sum is σ = 56690170280640. Its totient is φ = 16268801367168.

The previous prime is 31604551555523. The next prime is 31604551555559. The reversal of 31604551555545 is 54555515540613.

31604551555545 is a `hidden beast` number, since 3 + 1 + 6 + 0 + 45 + 5 + 1 + 5 + 55 + 545 = 666.

It is not a de Polignac number, because 31604551555545 - 2⁶ = 31604551555481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31604551555491 and 31604551555500.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 549127 + ... + 7969356.

It is an arithmetic number, because the mean of its divisors is an integer number (1181045214180).

Almost surely, 2^{31604551555545} is an apocalyptic number.

It is an amenable number.

31604551555545 is a deficient number, since it is larger than the sum of its proper divisors (25085618725095).

31604551555545 is a wasteful number, since it uses less digits than its factorization.

31604551555545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8521366 (or 8521363 counting only the distinct ones).

The product of its (nonzero) digits is 22500000, while the sum is 54.

The spelling of 31604551555545 in words is "thirty-one trillion, six hundred four billion, five hundred fifty-one million, five hundred fifty-five thousand, five hundred forty-five".