61961188 has 12 divisors (see below), whose sum is σ = 111930112. Its totient is φ = 29981160.

The previous prime is 61961183. The next prime is 61961231. The reversal of 61961188 is 88116916.

It is a self number, because there is not a number n which added to its sum of digits gives 61961188.

It is not an unprimeable number, because it can be changed into a prime (61961183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249720 + ... + 249967.

Almost surely, 2^61961188 is an apocalyptic number.

It is an amenable number.

61961188 is a deficient number, since it is larger than the sum of its proper divisors (49968924).

61961188 is a wasteful number, since it uses less digits than its factorization.

61961188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499722 (or 499720 counting only the distinct ones).

The product of its digits is 20736, while the sum is 40.

The square root of 61961188 is about 7871.5429237221. The cubic root of 61961188 is about 395.7065557238.

The spelling of 61961188 in words is "sixty-one million, nine hundred sixty-one thousand, one hundred eighty-eight".