615961136557 has 12 divisors (see below), whose sum is σ = 668262909504. Its totient is φ = 567492279120.

The previous prime is 615961136521. The next prime is 615961136587. The reversal of 615961136557 is 755631169516.

615961136557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 615961136557 - 2⁷ = 615961136429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 615961136498 and 615961136507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615961136587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3396069 + ... + 3572842.

It is an arithmetic number, because the mean of its divisors is an integer number (55688575792).

Almost surely, 2^615961136557 is an apocalyptic number.

It is an amenable number.

615961136557 is a deficient number, since it is larger than the sum of its proper divisors (52301772947).

615961136557 is a wasteful number, since it uses less digits than its factorization.

615961136557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969460 (or 6969447 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 55.

The spelling of 615961136557 in words is "six hundred fifteen billion, nine hundred sixty-one million, one hundred thirty-six thousand, five hundred fifty-seven".