61290589872 has 80 divisors (see below), whose sum is σ = 170811076320. Its totient is φ = 18865606656.

The previous prime is 61290589859. The next prime is 61290589883. The reversal of 61290589872 is 27898509216.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

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, 665347 + ... + 751842.

It is an arithmetic number, because the mean of its divisors is an integer number (2135138454).

Almost surely, 2^61290589872 is an apocalyptic number.

It is an amenable number.

61290589872 is an abundant number, since it is smaller than the sum of its proper divisors (109520486448).

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

61290589872 is a wasteful number, since it uses less digits than its factorization.

61290589872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417270 (or 1417264 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 61290589872 in words is "sixty-one billion, two hundred ninety million, five hundred eighty-nine thousand, eight hundred seventy-two".