621640266431363 has 8 divisors (see below), whose sum is σ = 622269370628400. Its totient is φ = 621011199598848.

The previous prime is 621640266431347. The next prime is 621640266431449. The reversal of 621640266431363 is 363134662046126.

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 621640266431363 - 2⁴ = 621640266431347 is a prime.

It is a super-2 number, since 2×621640266431363² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621640266431263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24010283 + ... + 42658811.

It is an arithmetic number, because the mean of its divisors is an integer number (77783671328550).

Almost surely, 2^{621640266431363} is an apocalyptic number.

621640266431363 is a deficient number, since it is larger than the sum of its proper divisors (629104197037).

621640266431363 is a wasteful number, since it uses less digits than its factorization.

621640266431363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18682261.

The product of its (nonzero) digits is 13436928, while the sum is 53.

The spelling of 621640266431363 in words is "six hundred twenty-one trillion, six hundred forty billion, two hundred sixty-six million, four hundred thirty-one thousand, three hundred sixty-three".