61965590 has 16 divisors (see below), whose sum is σ = 115136640. Its totient is φ = 23986560.

The previous prime is 61965587. The next prime is 61965601. The reversal of 61965590 is 9556916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99635 + ... + 100254.

It is an arithmetic number, because the mean of its divisors is an integer number (7196040).

Almost surely, 2^61965590 is an apocalyptic number.

61965590 is a deficient number, since it is larger than the sum of its proper divisors (53171050).

61965590 is a wasteful number, since it uses less digits than its factorization.

61965590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199927.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 61965590 is about 7871.8225335687. The cubic root of 61965590 is about 395.7159264232.

The spelling of 61965590 in words is "sixty-one million, nine hundred sixty-five thousand, five hundred ninety".