61620365 has 8 divisors (see below), whose sum is σ = 74035680. Its totient is φ = 49235472.

The previous prime is 61620347. The next prime is 61620371. The reversal of 61620365 is 56302616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61620365 - 2⁸ = 61620109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2879 + ... + 11468.

It is an arithmetic number, because the mean of its divisors is an integer number (9254460).

Almost surely, 2^61620365 is an apocalyptic number.

It is an amenable number.

61620365 is a deficient number, since it is larger than the sum of its proper divisors (12415315).

61620365 is a wasteful number, since it uses less digits than its factorization.

61620365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15211.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 61620365 is about 7849.8640115610. The cubic root of 61620365 is about 394.9796816980.

The spelling of 61620365 in words is "sixty-one million, six hundred twenty thousand, three hundred sixty-five".