61987088478 has 24 divisors (see below), whose sum is σ = 144214859592. Its totient is φ = 17710596624.

The previous prime is 61987088459. The next prime is 61987088489. The reversal of 61987088478 is 87488078916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105419925 + ... + 105420512.

It is an arithmetic number, because the mean of its divisors is an integer number (6008952483).

Almost surely, 2^61987088478 is an apocalyptic number.

61987088478 is an abundant number, since it is smaller than the sum of its proper divisors (82227771114).

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

61987088478 is a wasteful number, since it uses less digits than its factorization.

61987088478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210840456 (or 210840449 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 66.

The spelling of 61987088478 in words is "sixty-one billion, nine hundred eighty-seven million, eighty-eight thousand, four hundred seventy-eight".