61820074565 has 8 divisors (see below), whose sum is σ = 78088515360. Its totient is φ = 46853109072.

The previous prime is 61820074549. The next prime is 61820074571. The reversal of 61820074565 is 56547002816.

61820074565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61820074565 - 2⁴ = 61820074549 is a prime.

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, 325368719 + ... + 325368908.

It is an arithmetic number, because the mean of its divisors is an integer number (9761064420).

Almost surely, 2^61820074565 is an apocalyptic number.

It is an amenable number.

61820074565 is a deficient number, since it is larger than the sum of its proper divisors (16268440795).

61820074565 is a wasteful number, since it uses less digits than its factorization.

61820074565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650737651.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 61820074565 in words is "sixty-one billion, eight hundred twenty million, seventy-four thousand, five hundred sixty-five".