61313632656 has 20 divisors (see below), whose sum is σ = 158393551152. Its totient is φ = 20437877536.

The previous prime is 61313632651. The next prime is 61313632663. The reversal of 61313632656 is 65623631316.

It is a super-3 number, since 3×61313632656³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61313632651) 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, 638683626 + ... + 638683721.

Almost surely, 2^61313632656 is an apocalyptic number.

It is an amenable number.

61313632656 is an abundant number, since it is smaller than the sum of its proper divisors (97079918496).

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

61313632656 is a wasteful number, since it uses less digits than its factorization.

61313632656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277367358 (or 1277367352 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The spelling of 61313632656 in words is "sixty-one billion, three hundred thirteen million, six hundred thirty-two thousand, six hundred fifty-six".