61671125616 has 40 divisors (see below), whose sum is σ = 159326350080. Its totient is φ = 20555845056.

The previous prime is 61671125567. The next prime is 61671125617. The reversal of 61671125616 is 61652117616.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61671125617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258665 + ... + 1306743.

It is an arithmetic number, because the mean of its divisors is an integer number (3983158752).

Almost surely, 2^61671125616 is an apocalyptic number.

It is an amenable number.

61671125616 is an abundant number, since it is smaller than the sum of its proper divisors (97655224464).

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

61671125616 is a wasteful number, since it uses less digits than its factorization.

61671125616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74813 (or 74807 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The spelling of 61671125616 in words is "sixty-one billion, six hundred seventy-one million, one hundred twenty-five thousand, six hundred sixteen".