61799721402 has 16 divisors (see below), whose sum is σ = 123627327552. Its totient is φ = 20595259680.

The previous prime is 61799721397. The next prime is 61799721413. The reversal of 61799721402 is 20412799716.

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, 1132998 + ... + 1186289.

It is an arithmetic number, because the mean of its divisors is an integer number (7726707972).

Almost surely, 2^61799721402 is an apocalyptic number.

61799721402 is an abundant number, since it is smaller than the sum of its proper divisors (61827606150).

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

61799721402 is a wasteful number, since it uses less digits than its factorization.

61799721402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323733.

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 61799721402 in words is "sixty-one billion, seven hundred ninety-nine million, seven hundred twenty-one thousand, four hundred two".