61611510550149 has 12 divisors (see below), whose sum is σ = 101707890432096. Its totient is φ = 35206577457192.

The previous prime is 61611510550087. The next prime is 61611510550169. The reversal of 61611510550149 is 94105501511616.

61611510550149 is a `hidden beast` number, since 6 + 1 + 6 + 1 + 1 + 51 + 0 + 550 + 1 + 49 = 666.

It is not a de Polignac number, because 61611510550149 - 2⁷ = 61611510550021 is a prime.

It is a super-2 number, since 2×61611510550149² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61611510550169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488980242399 + ... + 488980242524.

It is an arithmetic number, because the mean of its divisors is an integer number (8475657536008).

Almost surely, 2^{61611510550149} is an apocalyptic number.

It is an amenable number.

61611510550149 is a deficient number, since it is larger than the sum of its proper divisors (40096379881947).

61611510550149 is a wasteful number, since it uses less digits than its factorization.

61611510550149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977960484936 (or 977960484933 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 61611510550149 in words is "sixty-one trillion, six hundred eleven billion, five hundred ten million, five hundred fifty thousand, one hundred forty-nine".