61493188 has 6 divisors (see below), whose sum is σ = 107613086. Its totient is φ = 30746592.

The previous prime is 61493111. The next prime is 61493227. The reversal of 61493188 is 88139416.

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 777924 = 7792^2 + 882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61493188.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7686645 + ... + 7686652.

Almost surely, 2^61493188 is an apocalyptic number.

It is an amenable number.

61493188 is a deficient number, since it is larger than the sum of its proper divisors (46119898).

61493188 is a wasteful number, since it uses less digits than its factorization.

61493188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373301 (or 15373299 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 61493188 is about 7841.7592413948. The cubic root of 61493188 is about 394.7077644053.

The spelling of 61493188 in words is "sixty-one million, four hundred ninety-three thousand, one hundred eighty-eight".