61388752558877 has 16 divisors (see below), whose sum is σ = 66850104384000. Its totient is φ = 56150563097664.

The previous prime is 61388752558871. The next prime is 61388752558961. The reversal of 61388752558877 is 77885525788316.

It is a cyclic number.

It is not a de Polignac number, because 61388752558877 - 2²⁰ = 61388751510301 is a prime.

It is a super-2 number, since 2×61388752558877² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61388752558871) 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, 15987383 + ... + 19451835.

It is an arithmetic number, because the mean of its divisors is an integer number (4178131524000).

Almost surely, 2^{61388752558877} is an apocalyptic number.

It is an amenable number.

61388752558877 is a deficient number, since it is larger than the sum of its proper divisors (5461351825123).

61388752558877 is a wasteful number, since it uses less digits than its factorization.

61388752558877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496660.

The product of its digits is 6322176000, while the sum is 80.

The spelling of 61388752558877 in words is "sixty-one trillion, three hundred eighty-eight billion, seven hundred fifty-two million, five hundred fifty-eight thousand, eight hundred seventy-seven".