155025430365561 has 8 divisors (see below), whose sum is σ = 236229227223744. Its totient is φ = 88585960208880.

The previous prime is 155025430365473. The next prime is 155025430365581. The reversal of 155025430365561 is 165563034520551.

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

It is not a de Polignac number, because 155025430365561 - 2⁹ = 155025430365049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155025430365581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3691081675350 + ... + 3691081675391.

It is an arithmetic number, because the mean of its divisors is an integer number (29528653402968).

Almost surely, 2^{155025430365561} is an apocalyptic number.

It is an amenable number.

155025430365561 is a deficient number, since it is larger than the sum of its proper divisors (81203796858183).

155025430365561 is an equidigital number, since it uses as much as digits as its factorization.

155025430365561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382163350751.

The product of its (nonzero) digits is 8100000, while the sum is 51.

The spelling of 155025430365561 in words is "one hundred fifty-five trillion, twenty-five billion, four hundred thirty million, three hundred sixty-five thousand, five hundred sixty-one".