1623561531161 has 8 divisors (see below), whose sum is σ = 1654265882304. Its totient is φ = 1592859814000.

The previous prime is 1623561531131. The next prime is 1623561531167. The reversal of 1623561531161 is 1611351653261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1623561531161 - 2³⁰ = 1622487789337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1623561531167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608786 + ... + 1902036.

It is an arithmetic number, because the mean of its divisors is an integer number (206783235288).

Almost surely, 2^{1623561531161} is an apocalyptic number.

It is an amenable number.

1623561531161 is a deficient number, since it is larger than the sum of its proper divisors (30704351143).

1623561531161 is a wasteful number, since it uses less digits than its factorization.

1623561531161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316991.

The product of its digits is 97200, while the sum is 41.

The spelling of 1623561531161 in words is "one trillion, six hundred twenty-three billion, five hundred sixty-one million, five hundred thirty-one thousand, one hundred sixty-one".