61081868022 has 32 divisors (see below), whose sum is σ = 139713948672. Its totient is φ = 17439681024.

The previous prime is 61081868017. The next prime is 61081868051. The reversal of 61081868022 is 22086818016.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 451243 + ... + 570774.

It is an arithmetic number, because the mean of its divisors is an integer number (4366060896).

Almost surely, 2^61081868022 is an apocalyptic number.

61081868022 is an abundant number, since it is smaller than the sum of its proper divisors (78632080650).

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

61081868022 is a wasteful number, since it uses less digits than its factorization.

61081868022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023452.

The product of its (nonzero) digits is 73728, while the sum is 42.

The spelling of 61081868022 in words is "sixty-one billion, eighty-one million, eight hundred sixty-eight thousand, twenty-two".