610660400558121 has 40 divisors (see below), whose sum is σ = 918040100919744. Its totient is φ = 404510069789280.

The previous prime is 610660400558041. The next prime is 610660400558183. The reversal of 610660400558121 is 121855004066016.

610660400558121 is a `hidden beast` number, since 6 + 1 + 0 + 6 + 6 + 0 + 40 + 0 + 5 + 581 + 21 = 666.

It is not a de Polignac number, because 610660400558121 - 2¹⁵ = 610660400525353 is a prime.

It is a super-2 number, since 2×610660400558121² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (610660400558191) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2129737956 + ... + 2130024666.

Almost surely, 2^{610660400558121} is an apocalyptic number.

It is an amenable number.

610660400558121 is a deficient number, since it is larger than the sum of its proper divisors (307379700361623).

610660400558121 is a wasteful number, since it uses less digits than its factorization.

610660400558121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454363 (or 454354 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 610660400558121 in words is "six hundred ten trillion, six hundred sixty billion, four hundred million, five hundred fifty-eight thousand, one hundred twenty-one".