61321868 has 12 divisors (see below), whose sum is σ = 107634072. Its totient is φ = 30569280.

The previous prime is 61321831. The next prime is 61321877. The reversal of 61321868 is 86812316.

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, 21398 + ... + 24093.

It is an arithmetic number, because the mean of its divisors is an integer number (8969506).

Almost surely, 2^61321868 is an apocalyptic number.

It is an amenable number.

61321868 is a deficient number, since it is larger than the sum of its proper divisors (46312204).

61321868 is a wasteful number, since it uses less digits than its factorization.

61321868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45832 (or 45830 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 61321868 is about 7830.8280532776. The cubic root of 61321868 is about 394.3408715757.

It can be divided in two parts, 6132 and 1868, that added together give a cube (8000 = 20³).

The spelling of 61321868 in words is "sixty-one million, three hundred twenty-one thousand, eight hundred sixty-eight".