61574013642 has 16 divisors (see below), whose sum is σ = 123859867680. Its totient is φ = 20406031152.

The previous prime is 61574013607. The next prime is 61574013653. The reversal of 61574013642 is 24631047516.

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 61574013642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29658892 + ... + 29660967.

It is an arithmetic number, because the mean of its divisors is an integer number (7741241730).

Almost surely, 2^61574013642 is an apocalyptic number.

61574013642 is an abundant number, since it is smaller than the sum of its proper divisors (62285854038).

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

61574013642 is a wasteful number, since it uses less digits than its factorization.

61574013642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59320037.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 61574013642 in words is "sixty-one billion, five hundred seventy-four million, thirteen thousand, six hundred forty-two".