415561421623 has 2 divisors, whose sum is σ = 415561421624. Its totient is φ = 415561421622.

The previous prime is 415561421563. The next prime is 415561421629. The reversal of 415561421623 is 326124165514.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 415561421623 - 2²¹ = 415559324471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (415561421629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207780710811 + 207780710812.

It is an arithmetic number, because the mean of its divisors is an integer number (207780710812).

Almost surely, 2^415561421623 is an apocalyptic number.

415561421623 is a deficient number, since it is larger than the sum of its proper divisors (1).

415561421623 is an equidigital number, since it uses as much as digits as its factorization.

415561421623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 40.

The spelling of 415561421623 in words is "four hundred fifteen billion, five hundred sixty-one million, four hundred twenty-one thousand, six hundred twenty-three".