61812488 has 8 divisors (see below), whose sum is σ = 115898430. Its totient is φ = 30906240.

The previous prime is 61812479. The next prime is 61812511. The reversal of 61812488 is 88421816.

It can be written as a sum of positive squares in only one way, i.e., 61811044 + 1444 = 7862^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3863273 + ... + 3863288.

Almost surely, 2^61812488 is an apocalyptic number.

It is an amenable number.

61812488 is a deficient number, since it is larger than the sum of its proper divisors (54085942).

61812488 is a wasteful number, since it uses less digits than its factorization.

61812488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7726567 (or 7726563 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 61812488 is about 7862.0918336026. The cubic root of 61812488 is about 395.3897514969.

The spelling of 61812488 in words is "sixty-one million, eight hundred twelve thousand, four hundred eighty-eight".