61566000011872 has 24 divisors (see below), whose sum is σ = 121231225104696. Its totient is φ = 30777117445632.

The previous prime is 61566000011801. The next prime is 61566000011897. The reversal of 61566000011872 is 27811000066516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183659938 + ... + 183994849.

It is an arithmetic number, because the mean of its divisors is an integer number (5051301046029).

Almost surely, 2^{61566000011872} is an apocalyptic number.

It is an amenable number.

61566000011872 is a deficient number, since it is larger than the sum of its proper divisors (59665225092824).

61566000011872 is a wasteful number, since it uses less digits than its factorization.

61566000011872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367660030 (or 367660022 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 61566000011872 in words is "sixty-one trillion, five hundred sixty-six billion, eleven thousand, eight hundred seventy-two".