621045340644367 has 4 divisors (see below), whose sum is σ = 621094917198816. Its totient is φ = 620995764089920.

The previous prime is 621045340644353. The next prime is 621045340644383. The reversal of 621045340644367 is 763446043540126.

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

It is a cyclic number.

It is not a de Polignac number, because 621045340644367 - 2¹⁵ = 621045340611599 is a prime.

It is a super-2 number, since 2×621045340644367² (a number of 30 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 (621045340644067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24788258434 + ... + 24788283487.

It is an arithmetic number, because the mean of its divisors is an integer number (155273729299704).

Almost surely, 2^{621045340644367} is an apocalyptic number.

621045340644367 is a deficient number, since it is larger than the sum of its proper divisors (49576554449).

621045340644367 is a wasteful number, since it uses less digits than its factorization.

621045340644367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49576554448.

The product of its (nonzero) digits is 34836480, while the sum is 55.

The spelling of 621045340644367 in words is "six hundred twenty-one trillion, forty-five billion, three hundred forty million, six hundred forty-four thousand, three hundred sixty-seven".