61161808 has 10 divisors (see below), whose sum is σ = 118501034. Its totient is φ = 30580896.

The previous prime is 61161769. The next prime is 61161811. The reversal of 61161808 is 80816116.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30603024 + 30558784 = 5532^2 + 5528^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61161808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1911291 + ... + 1911322.

Almost surely, 2^61161808 is an apocalyptic number.

It is an amenable number.

61161808 is a deficient number, since it is larger than the sum of its proper divisors (57339226).

61161808 is a wasteful number, since it uses less digits than its factorization.

61161808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822621 (or 3822615 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 61161808 is about 7820.6015113928. The cubic root of 61161808 is about 393.9974747964.

The spelling of 61161808 in words is "sixty-one million, one hundred sixty-one thousand, eight hundred eight".