61161516 has 36 divisors (see below), whose sum is σ = 166496512. Its totient is φ = 18818784.

The previous prime is 61161511. The next prime is 61161539. The reversal of 61161516 is 61516116.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61161516.

It is not an unprimeable number, because it can be changed into a prime (61161511) 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, 64876 + ... + 65811.

Almost surely, 2^61161516 is an apocalyptic number.

It is an amenable number.

61161516 is an abundant number, since it is smaller than the sum of its proper divisors (105334996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61161516 is a wasteful number, since it uses less digits than its factorization.

61161516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130710 (or 130705 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 61161516 is about 7820.5828427298. The cubic root of 61161516 is about 393.9968477850.

The spelling of 61161516 in words is "sixty-one million, one hundred sixty-one thousand, five hundred sixteen".