61617772 has 12 divisors (see below), whose sum is σ = 107988160. Its totient is φ = 30764016.

The previous prime is 61617761. The next prime is 61617791. The reversal of 61617772 is 27771616.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8028 + ... + 13699.

Almost surely, 2^61617772 is an apocalyptic number.

It is an amenable number.

61617772 is a deficient number, since it is larger than the sum of its proper divisors (46370388).

61617772 is a wasteful number, since it uses less digits than its factorization.

61617772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22440 (or 22438 counting only the distinct ones).

The product of its digits is 24696, while the sum is 37.

The square root of 61617772 is about 7849.6988477266. The cubic root of 61617772 is about 394.9741413398.

The spelling of 61617772 in words is "sixty-one million, six hundred seventeen thousand, seven hundred seventy-two".