61611516 has 30 divisors (see below), whose sum is σ = 161065520. Its totient is φ = 20537064.

The previous prime is 61611499. The next prime is 61611521. The reversal of 61611516 is 61511616.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 61611516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 94756 + ... + 95403.

Almost surely, 2^61611516 is an apocalyptic number.

It is an amenable number.

61611516 is an abundant number, since it is smaller than the sum of its proper divisors (99454004).

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

61611516 is a wasteful number, since it uses less digits than its factorization.

61611516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190175 (or 190164 counting only the distinct ones).

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

The square root of 61611516 is about 7849.3003509867. The cubic root of 61611516 is about 394.9607737578.

The spelling of 61611516 in words is "sixty-one million, six hundred eleven thousand, five hundred sixteen".