1623164561225 has 48 divisors (see below), whose sum is σ = 2031577970688. Its totient is φ = 1286443491840.

The previous prime is 1623164561189. The next prime is 1623164561281. The reversal of 1623164561225 is 5221654613261.

It is not a de Polignac number, because 1623164561225 - 2¹⁰ = 1623164560201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1732298957 + ... + 1732299893.

It is an arithmetic number, because the mean of its divisors is an integer number (42324541056).

Almost surely, 2^{1623164561225} is an apocalyptic number.

It is an amenable number.

1623164561225 is a deficient number, since it is larger than the sum of its proper divisors (408413409463).

1623164561225 is a wasteful number, since it uses less digits than its factorization.

1623164561225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354 (or 2349 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 1623164561225 in words is "one trillion, six hundred twenty-three billion, one hundred sixty-four million, five hundred sixty-one thousand, two hundred twenty-five".