621371742701 has 8 divisors (see below), whose sum is σ = 623710442520. Its totient is φ = 619033256512.

The previous prime is 621371742679. The next prime is 621371742707. The reversal of 621371742701 is 107247173126.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 254370601 + 621117372100 = 15949^2 + 788110^2 .

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 621371742701 - 2¹⁰ = 621371741677 is a prime.

It is a super-2 number, since 2×621371742701² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621371742707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8110691 + ... + 8186943.

It is an arithmetic number, because the mean of its divisors is an integer number (77963805315).

Almost surely, 2^621371742701 is an apocalyptic number.

It is an amenable number.

621371742701 is a deficient number, since it is larger than the sum of its proper divisors (2338699819).

621371742701 is a wasteful number, since it uses less digits than its factorization.

621371742701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106815.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 621371742701 in words is "six hundred twenty-one billion, three hundred seventy-one million, seven hundred forty-two thousand, seven hundred one".