61784740912 has 20 divisors (see below), whose sum is σ = 121223228320. Its totient is φ = 30501327168.

The previous prime is 61784740883. The next prime is 61784740999. The reversal of 61784740912 is 21904748716.

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, 24438903 + ... + 24441430.

It is an arithmetic number, because the mean of its divisors is an integer number (6061161416).

Almost surely, 2^61784740912 is an apocalyptic number.

It is an amenable number.

61784740912 is a deficient number, since it is larger than the sum of its proper divisors (59438487408).

61784740912 is a wasteful number, since it uses less digits than its factorization.

61784740912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48880420 (or 48880414 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 61784740912 in words is "sixty-one billion, seven hundred eighty-four million, seven hundred forty thousand, nine hundred twelve".