61388125560379 has 4 divisors (see below), whose sum is σ = 61388145241920. Its totient is φ = 61388105878840.

The previous prime is 61388125560373. The next prime is 61388125560401. The reversal of 61388125560379 is 97306552188316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61388125560379 - 2²⁷ = 61387991342651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61388125560379.

It is not an unprimeable number, because it can be changed into a prime (61388125560373) 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, 4010932 + ... + 11784049.

It is an arithmetic number, because the mean of its divisors is an integer number (15347036310480).

Almost surely, 2^{61388125560379} is an apocalyptic number.

61388125560379 is a deficient number, since it is larger than the sum of its proper divisors (19681541).

61388125560379 is a wasteful number, since it uses less digits than its factorization.

61388125560379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19681540.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 61388125560379 in words is "sixty-one trillion, three hundred eighty-eight billion, one hundred twenty-five million, five hundred sixty thousand, three hundred seventy-nine".