621086956498 has 4 divisors (see below), whose sum is σ = 931630434750. Its totient is φ = 310543478248.

The previous prime is 621086956459. The next prime is 621086956519. The reversal of 621086956498 is 894659680126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 513153024409 + 107933932089 = 716347^2 + 328533^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155271739123 + ... + 155271739126.

Almost surely, 2^621086956498 is an apocalyptic number.

621086956498 is a deficient number, since it is larger than the sum of its proper divisors (310543478252).

621086956498 is a wasteful number, since it uses less digits than its factorization.

621086956498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310543478251.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 621086956498 in words is "six hundred twenty-one billion, eighty-six million, nine hundred fifty-six thousand, four hundred ninety-eight".