621496023745 has 8 divisors (see below), whose sum is σ = 750106184616. Its totient is φ = 494322848256.

The previous prime is 621496023739. The next prime is 621496023769. The reversal of 621496023745 is 547320694126.

It can be written as a sum of positive squares in 4 ways, for example, as 278048453809 + 343447569936 = 527303^2 + 586044^2 .

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 621496023745 - 2³ = 621496023737 is a prime.

It is a Duffinian 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, 359245392 + ... + 359247121.

It is an arithmetic number, because the mean of its divisors is an integer number (93763273077).

Almost surely, 2^621496023745 is an apocalyptic number.

It is an amenable number.

621496023745 is a deficient number, since it is larger than the sum of its proper divisors (128610160871).

621496023745 is a wasteful number, since it uses less digits than its factorization.

621496023745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718492691.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 621496023745 in words is "six hundred twenty-one billion, four hundred ninety-six million, twenty-three thousand, seven hundred forty-five".