1615630451923 has 2 divisors, whose sum is σ = 1615630451924. Its totient is φ = 1615630451922.

The previous prime is 1615630451917. The next prime is 1615630451933. The reversal of 1615630451923 is 3291540365161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1615630451923 - 2⁵ = 1615630451891 is a prime.

It is a super-2 number, since 2×1615630451923² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1615630451933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807815225961 + 807815225962.

It is an arithmetic number, because the mean of its divisors is an integer number (807815225962).

Almost surely, 2^{1615630451923} is an apocalyptic number.

1615630451923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615630451923 is an equidigital number, since it uses as much as digits as its factorization.

1615630451923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 1615630451923 in words is "one trillion, six hundred fifteen billion, six hundred thirty million, four hundred fifty-one thousand, nine hundred twenty-three".