61637263368 has 32 divisors (see below), whose sum is σ = 160792862400. Its totient is φ = 19652460608.

The previous prime is 61637263343. The next prime is 61637263381. The reversal of 61637263368 is 86336273616.

It is a self number, because there is not a number n which added to its sum of digits gives 61637263368.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55830303 + ... + 55831406.

It is an arithmetic number, because the mean of its divisors is an integer number (5024776950).

Almost surely, 2^61637263368 is an apocalyptic number.

It is an amenable number.

61637263368 is an abundant number, since it is smaller than the sum of its proper divisors (99155599032).

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

61637263368 is a wasteful number, since it uses less digits than its factorization.

61637263368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111661741 (or 111661737 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 51.

The spelling of 61637263368 in words is "sixty-one billion, six hundred thirty-seven million, two hundred sixty-three thousand, three hundred sixty-eight".