30687472736661 has 16 divisors (see below), whose sum is σ = 44475877099584. Its totient is φ = 18708107028864.

The previous prime is 30687472736579. The next prime is 30687472736783. The reversal of 30687472736661 is 16663727478603.

It is not a de Polignac number, because 30687472736661 - 2⁷ = 30687472736533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30687472736592 and 30687472736601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30687472736161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3676903656 + ... + 3676912001.

It is an arithmetic number, because the mean of its divisors is an integer number (2779742318724).

Almost surely, 2^{30687472736661} is an apocalyptic number.

It is an amenable number.

30687472736661 is a deficient number, since it is larger than the sum of its proper divisors (13788404362923).

30687472736661 is a wasteful number, since it uses less digits than its factorization.

30687472736661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353815780.

The product of its (nonzero) digits is 256048128, while the sum is 66.

The spelling of 30687472736661 in words is "thirty trillion, six hundred eighty-seven billion, four hundred seventy-two million, seven hundred thirty-six thousand, six hundred sixty-one".