621740074894 has 8 divisors (see below), whose sum is σ = 987469530768. Its totient is φ = 292583564640.

The previous prime is 621740074861. The next prime is 621740074957. The reversal of 621740074894 is 498470047126.

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

It is a super-2 number, since 2×621740074894² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9143236362 + ... + 9143236429.

It is an arithmetic number, because the mean of its divisors is an integer number (123433691346).

Almost surely, 2^621740074894 is an apocalyptic number.

621740074894 is a deficient number, since it is larger than the sum of its proper divisors (365729455874).

621740074894 is a wasteful number, since it uses less digits than its factorization.

621740074894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18286472810.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 621740074894 in words is "six hundred twenty-one billion, seven hundred forty million, seventy-four thousand, eight hundred ninety-four".