61117136885026 has 16 divisors (see below), whose sum is σ = 94838448016440. Its totient is φ = 29504354467840.

The previous prime is 61117136885011. The next prime is 61117136885039. The reversal of 61117136885026 is 62058863171116.

It is a Cunningham number, because it is equal to 7817745²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 43576963651225 + 17540173233801 = 6601285^2 + 4188099^2 .

It is a super-3 number, since 3×61117136885026³ (a number of 42 digits) contains 333 as substring.

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, 4712671 + ... + 12018466.

Almost surely, 2^{61117136885026} is an apocalyptic number.

61117136885026 is a deficient number, since it is larger than the sum of its proper divisors (33721311131414).

61117136885026 is a wasteful number, since it uses less digits than its factorization.

61117136885026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16794149.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 61117136885026 in words is "sixty-one trillion, one hundred seventeen billion, one hundred thirty-six million, eight hundred eighty-five thousand, twenty-six".