61626706531 has 8 divisors (see below), whose sum is σ = 68160931664. Its totient is φ = 55348725600.

The previous prime is 61626706481. The next prime is 61626706627. The reversal of 61626706531 is 13560762616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61626706531 - 2⁷ = 61626706403 is a prime.

It is a super-2 number, since 2×61626706531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61626706931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64060545 + ... + 64061506.

It is an arithmetic number, because the mean of its divisors is an integer number (8520116458).

Almost surely, 2^61626706531 is an apocalyptic number.

61626706531 is a deficient number, since it is larger than the sum of its proper divisors (6534225133).

61626706531 is a wasteful number, since it uses less digits than its factorization.

61626706531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128122101.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 61626706531 in words is "sixty-one billion, six hundred twenty-six million, seven hundred six thousand, five hundred thirty-one".