61686897006654 has 48 divisors (see below), whose sum is σ = 134434479323664. Its totient is φ = 20442382732800.

The previous prime is 61686897006619. The next prime is 61686897006661. The reversal of 61686897006654 is 45660079868616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60783369 + ... + 61789899.

It is an arithmetic number, because the mean of its divisors is an integer number (2800718319243).

Almost surely, 2^{61686897006654} is an apocalyptic number.

61686897006654 is an abundant number, since it is smaller than the sum of its proper divisors (72747582317010).

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

61686897006654 is a wasteful number, since it uses less digits than its factorization.

61686897006654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026393 (or 1026390 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 72.

The spelling of 61686897006654 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred ninety-seven million, six thousand, six hundred fifty-four".