621348900451 has 2 divisors, whose sum is σ = 621348900452. Its totient is φ = 621348900450.

The previous prime is 621348900449. The next prime is 621348900461. The reversal of 621348900451 is 154009843126.

621348900451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621348900451 - 2¹ = 621348900449 is a prime.

Together with 621348900449, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 621348900398 and 621348900407.

It is not a weakly prime, because it can be changed into another prime (621348900461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310674450225 + 310674450226.

It is an arithmetic number, because the mean of its divisors is an integer number (310674450226).

Almost surely, 2^621348900451 is an apocalyptic number.

621348900451 is a deficient number, since it is larger than the sum of its proper divisors (1).

621348900451 is an equidigital number, since it uses as much as digits as its factorization.

621348900451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 621348900451 in words is "six hundred twenty-one billion, three hundred forty-eight million, nine hundred thousand, four hundred fifty-one".