1557231502505 has 32 divisors (see below), whose sum is σ = 2186654400000. Its totient is φ = 1064171121216.

The previous prime is 1557231502499. The next prime is 1557231502529. The reversal of 1557231502505 is 5052051327551.

It is a happy number.

It is not a de Polignac number, because 1557231502505 - 2²⁰ = 1557230453929 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1047005 + ... + 2051994.

It is an arithmetic number, because the mean of its divisors is an integer number (68332950000).

Almost surely, 2^{1557231502505} is an apocalyptic number.

It is an amenable number.

1557231502505 is a deficient number, since it is larger than the sum of its proper divisors (629422897495).

1557231502505 is an equidigital number, since it uses as much as digits as its factorization.

1557231502505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099318 (or 3099304 counting only the distinct ones).

The product of its (nonzero) digits is 262500, while the sum is 41.

The spelling of 1557231502505 in words is "one trillion, five hundred fifty-seven billion, two hundred thirty-one million, five hundred two thousand, five hundred five".