61281562888 has 64 divisors (see below), whose sum is σ = 141455784960. Its totient is φ = 24236948736.

The previous prime is 61281562873. The next prime is 61281562921. The reversal of 61281562888 is 88826518216.

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, 3611881 + ... + 3628807.

It is an arithmetic number, because the mean of its divisors is an integer number (2210246640).

Almost surely, 2^61281562888 is an apocalyptic number.

It is an amenable number.

61281562888 is an abundant number, since it is smaller than the sum of its proper divisors (80174222072).

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

61281562888 is a wasteful number, since it uses less digits than its factorization.

61281562888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21926 (or 21922 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 55.

It can be divided in two parts, 612815 and 62888, that added together give a triangular number (675703 = T₁₁₆₂).

The spelling of 61281562888 in words is "sixty-one billion, two hundred eighty-one million, five hundred sixty-two thousand, eight hundred eighty-eight".