461640660563541 has 64 divisors (see below), whose sum is σ = 621651411763200. Its totient is φ = 304716624576000.

The previous prime is 461640660563501. The next prime is 461640660563549. The reversal of 461640660563541 is 145365066046164.

It is a de Polignac number, because none of the positive numbers 2^k-461640660563541 is a prime.

It is a super-2 number, since 2×461640660563541² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461640660563549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 178170844156 + ... + 178170846746.

It is an arithmetic number, because the mean of its divisors is an integer number (9713303308800).

Almost surely, 2^{461640660563541} is an apocalyptic number.

It is an amenable number.

461640660563541 is a deficient number, since it is larger than the sum of its proper divisors (160010751199659).

461640660563541 is a wasteful number, since it uses less digits than its factorization.

461640660563541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010.

The product of its (nonzero) digits is 37324800, while the sum is 57.

The spelling of 461640660563541 in words is "four hundred sixty-one trillion, six hundred forty billion, six hundred sixty million, five hundred sixty-three thousand, five hundred forty-one".