516156555661 has 16 divisors (see below), whose sum is σ = 557215547328. Its totient is φ = 476298784000.

The previous prime is 516156555659. The next prime is 516156555737. The reversal of 516156555661 is 166555651615.

It is a cyclic number.

It is not a de Polignac number, because 516156555661 - 2¹ = 516156555659 is a prime.

It is a super-2 number, since 2×516156555661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 516156555599 and 516156555608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516156555611) 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, 1109946 + ... + 1504756.

It is an arithmetic number, because the mean of its divisors is an integer number (34825971708).

Almost surely, 2^516156555661 is an apocalyptic number.

It is an amenable number.

516156555661 is a deficient number, since it is larger than the sum of its proper divisors (41058991667).

516156555661 is a wasteful number, since it uses less digits than its factorization.

516156555661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396332.

The product of its digits is 4050000, while the sum is 52.

The spelling of 516156555661 in words is "five hundred sixteen billion, one hundred fifty-six million, five hundred fifty-five thousand, six hundred sixty-one".