61090418857 has 12 divisors (see below), whose sum is σ = 69434544900. Its totient is φ = 53423196192.

The previous prime is 61090418827. The next prime is 61090418861. The reversal of 61090418857 is 75881409016.

It can be written as a sum of positive squares in 2 ways, for example, as 26427054096 + 34663364761 = 162564^2 + 186181^2 .

It is not a de Polignac number, because 61090418857 - 2³⁵ = 26730680489 is a prime.

It is a super-2 number, since 2×61090418857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61090418857.

It is not an unprimeable number, because it can be changed into a prime (61090418827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6503982 + ... + 6513367.

It is an arithmetic number, because the mean of its divisors is an integer number (5786212075).

Almost surely, 2^61090418857 is an apocalyptic number.

It is an amenable number.

61090418857 is a deficient number, since it is larger than the sum of its proper divisors (8344126043).

61090418857 is a wasteful number, since it uses less digits than its factorization.

61090418857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13017400 (or 13017381 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 61090418857 in words is "sixty-one billion, ninety million, four hundred eighteen thousand, eight hundred fifty-seven".