61819764695039 has 24 divisors (see below), whose sum is σ = 70883051186160. Its totient is φ = 53704319006208.

The previous prime is 61819764695021. The next prime is 61819764695099. The reversal of 61819764695039 is 93059646791816.

It is a de Polignac number, because none of the positive numbers 2^k-61819764695039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61819764695099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45962984 + ... + 47288850.

It is an arithmetic number, because the mean of its divisors is an integer number (2953460466090).

Almost surely, 2^{61819764695039} is an apocalyptic number.

61819764695039 is a deficient number, since it is larger than the sum of its proper divisors (9063286491121).

61819764695039 is a wasteful number, since it uses less digits than its factorization.

61819764695039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342139 (or 1342126 counting only the distinct ones).

The product of its (nonzero) digits is 529079040, while the sum is 74.

The spelling of 61819764695039 in words is "sixty-one trillion, eight hundred nineteen billion, seven hundred sixty-four million, six hundred ninety-five thousand, thirty-nine".