616551660356 has 24 divisors (see below), whose sum is σ = 1109040497880. Its totient is φ = 299696689152.

The previous prime is 616551660299. The next prime is 616551660433. The reversal of 616551660356 is 653066155616.

It can be written as a sum of positive squares in 4 ways, for example, as 34138474756 + 582413185600 = 184766^2 + 763160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537661 + ... + 1896708.

It is an arithmetic number, because the mean of its divisors is an integer number (46210020745).

Almost surely, 2^616551660356 is an apocalyptic number.

It is an amenable number.

616551660356 is a deficient number, since it is larger than the sum of its proper divisors (492488837524).

616551660356 is a wasteful number, since it uses less digits than its factorization.

616551660356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435623 (or 3435621 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 616551660356 in words is "six hundred sixteen billion, five hundred fifty-one million, six hundred sixty thousand, three hundred fifty-six".