621414414157 has 2 divisors, whose sum is σ = 621414414158. Its totient is φ = 621414414156.

The previous prime is 621414414097. The next prime is 621414414167. The reversal of 621414414157 is 751414414126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570185071236 + 51229342921 = 755106^2 + 226339^2 .

It is a cyclic number.

It is not a de Polignac number, because 621414414157 - 2³⁵ = 587054675789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621414414167) 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 as a sum of consecutive naturals, namely, 310707207078 + 310707207079.

It is an arithmetic number, because the mean of its divisors is an integer number (310707207079).

Almost surely, 2^621414414157 is an apocalyptic number.

It is an amenable number.

621414414157 is a deficient number, since it is larger than the sum of its proper divisors (1).

621414414157 is an equidigital number, since it uses as much as digits as its factorization.

621414414157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The spelling of 621414414157 in words is "six hundred twenty-one billion, four hundred fourteen million, four hundred fourteen thousand, one hundred fifty-seven".