61611319539 has 72 divisors (see below), whose sum is σ = 118370659680. Its totient is φ = 30123118080.

The previous prime is 61611319501. The next prime is 61611319541. The reversal of 61611319539 is 93591311616.

61611319539 is a `hidden beast` number, since 616 + 1 + 13 + 19 + 5 + 3 + 9 = 666.

It is not a de Polignac number, because 61611319539 - 2⁷ = 61611319411 is a prime.

It is a super-3 number, since 3×61611319539³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61611319494 and 61611319503.

It is not an unprimeable number, because it can be changed into a prime (61611319739) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 108124 + ... + 367305.

It is an arithmetic number, because the mean of its divisors is an integer number (1644036940).

Almost surely, 2^61611319539 is an apocalyptic number.

61611319539 is a deficient number, since it is larger than the sum of its proper divisors (56759340141).

61611319539 is a wasteful number, since it uses less digits than its factorization.

61611319539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475481 (or 475467 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The spelling of 61611319539 in words is "sixty-one billion, six hundred eleven million, three hundred nineteen thousand, five hundred thirty-nine".