157866262553 has 4 divisors (see below), whose sum is σ = 158187782928. Its totient is φ = 157544742180.

The previous prime is 157866262501. The next prime is 157866262601. The reversal of 157866262553 is 355262668751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355262668751 = 109 ⋅3259290539.

It is a cyclic number.

It is not a de Polignac number, because 157866262553 - 2¹² = 157866258457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157866262453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160759451 + ... + 160760432.

It is an arithmetic number, because the mean of its divisors is an integer number (39546945732).

Almost surely, 2^157866262553 is an apocalyptic number.

It is an amenable number.

157866262553 is a deficient number, since it is larger than the sum of its proper divisors (321520375).

157866262553 is an equidigital number, since it uses as much as digits as its factorization.

157866262553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321520374.

The product of its digits is 18144000, while the sum is 56.

The spelling of 157866262553 in words is "one hundred fifty-seven billion, eight hundred sixty-six million, two hundred sixty-two thousand, five hundred fifty-three".