61517747802 has 32 divisors (see below), whose sum is σ = 142538193792. Its totient is φ = 17335724544.

The previous prime is 61517747791. The next prime is 61517747807. The reversal of 61517747802 is 20874771516.

It is not an unprimeable number, because it can be changed into a prime (61517747807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10029183 + ... + 10035314.

It is an arithmetic number, because the mean of its divisors is an integer number (4454318556).

Almost surely, 2^61517747802 is an apocalyptic number.

61517747802 is an abundant number, since it is smaller than the sum of its proper divisors (81020445990).

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

61517747802 is a wasteful number, since it uses less digits than its factorization.

61517747802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20064582.

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 61517747802 in words is "sixty-one billion, five hundred seventeen million, seven hundred forty-seven thousand, eight hundred two".