61487376918 has 64 divisors (see below), whose sum is σ = 134759116800. Its totient is φ = 18548739360.

The previous prime is 61487376913. The next prime is 61487376931. The reversal of 61487376918 is 81967378416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61487376913) 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 31 ways as a sum of consecutive naturals, for example, 14571813 + ... + 14576031.

It is an arithmetic number, because the mean of its divisors is an integer number (2105611200).

Almost surely, 2^61487376918 is an apocalyptic number.

61487376918 is an abundant number, since it is smaller than the sum of its proper divisors (73271739882).

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

61487376918 is a wasteful number, since it uses less digits than its factorization.

61487376918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its digits is 12192768, while the sum is 60.

The spelling of 61487376918 in words is "sixty-one billion, four hundred eighty-seven million, three hundred seventy-six thousand, nine hundred eighteen".