61841974160 has 20 divisors (see below), whose sum is σ = 143782590108. Its totient is φ = 24736789632.

The previous prime is 61841974151. The next prime is 61841974169. The reversal of 61841974160 is 6147914816.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61841974151) and next prime (61841974169).

It can be written as a sum of positive squares in 2 ways, for example, as 26359470736 + 35482503424 = 162356^2 + 188368^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×61841974160² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61841974169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386512259 + ... + 386512418.

Almost surely, 2^61841974160 is an apocalyptic number.

It is an amenable number.

61841974160 is an abundant number, since it is smaller than the sum of its proper divisors (81940615948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61841974160 is a wasteful number, since it uses less digits than its factorization.

61841974160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773024690 (or 773024684 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 61841974160 in words is "sixty-one billion, eight hundred forty-one million, nine hundred seventy-four thousand, one hundred sixty".