621461324040547 has 2 divisors, whose sum is σ = 621461324040548. Its totient is φ = 621461324040546.

The previous prime is 621461324040421. The next prime is 621461324040581. The reversal of 621461324040547 is 745040423164126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621461324040547 - 2³⁹ = 620911568226659 is a prime.

It is a super-2 number, since 2×621461324040547² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621461324040547.

It is not a weakly prime, because it can be changed into another prime (621461324046547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310730662020273 + 310730662020274.

It is an arithmetic number, because the mean of its divisors is an integer number (310730662020274).

Almost surely, 2^{621461324040547} is an apocalyptic number.

621461324040547 is a deficient number, since it is larger than the sum of its proper divisors (1).

621461324040547 is an equidigital number, since it uses as much as digits as its factorization.

621461324040547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 621461324040547 in words is "six hundred twenty-one trillion, four hundred sixty-one billion, three hundred twenty-four million, forty thousand, five hundred forty-seven".