156716217457 has 8 divisors (see below), whose sum is σ = 156857923656. Its totient is φ = 156574559232.

The previous prime is 156716217433. The next prime is 156716217491. The reversal of 156716217457 is 754712617651.

It can be written as a sum of positive squares in 4 ways, for example, as 141828313201 + 14887904256 = 376601^2 + 122016^2 .

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 156716217457 - 2¹⁵ = 156716184689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156716287457) 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, 10104933 + ... + 10120429.

It is an arithmetic number, because the mean of its divisors is an integer number (19607240457).

Almost surely, 2^156716217457 is an apocalyptic number.

It is an amenable number.

156716217457 is a deficient number, since it is larger than the sum of its proper divisors (141706199).

156716217457 is a wasteful number, since it uses less digits than its factorization.

156716217457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23987.

The product of its digits is 2469600, while the sum is 52.

The spelling of 156716217457 in words is "one hundred fifty-six billion, seven hundred sixteen million, two hundred seventeen thousand, four hundred fifty-seven".