621967245201 has 9 divisors (see below), whose sum is σ = 898400549449. Its totient is φ = 414643252836.

The previous prime is 621967245187. The next prime is 621967245247. The reversal of 621967245201 is 102542769126.

The square root of 621967245201 is 788649.

It is a perfect power (a square), and thus also a powerful number.

621967245201 is a `hidden beast` number, since 6 + 2 + 196 + 7 + 2 + 452 + 0 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 621967245201 - 2²³ = 621958856593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621967245701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2234506 + ... + 2497388.

Almost surely, 2^621967245201 is an apocalyptic number.

621967245201 is the 788649-th square number.

621967245201 is the 394325-th centered octagonal number.

It is an amenable number.

621967245201 is a deficient number, since it is larger than the sum of its proper divisors (276433304248).

621967245201 is an frugal number, since it uses more digits than its factorization.

621967245201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525772 (or 262886 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 621967245201 in words is "six hundred twenty-one billion, nine hundred sixty-seven million, two hundred forty-five thousand, two hundred one".