61388534192 has 20 divisors (see below), whose sum is σ = 124111602480. Its totient is φ = 29359733568.

The previous prime is 61388534191. The next prime is 61388534219. The reversal of 61388534192 is 29143588316.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61388534192.

It is not an unprimeable number, because it can be changed into a prime (61388534191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83407967 + ... + 83408702.

It is an arithmetic number, because the mean of its divisors is an integer number (6205580124).

Almost surely, 2^61388534192 is an apocalyptic number.

It is an amenable number.

61388534192 is an abundant number, since it is smaller than the sum of its proper divisors (62723068288).

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

61388534192 is a wasteful number, since it uses less digits than its factorization.

61388534192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166816700 (or 166816694 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The spelling of 61388534192 in words is "sixty-one billion, three hundred eighty-eight million, five hundred thirty-four thousand, one hundred ninety-two".