169781490456 has 32 divisors (see below), whose sum is σ = 428656244400. Its totient is φ = 56033494400.

The previous prime is 169781490443. The next prime is 169781490493. The reversal of 169781490456 is 654094187961.

It is a self number, because there is not a number n which added to its sum of digits gives 169781490456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35018511 + ... + 35023358.

Almost surely, 2^169781490456 is an apocalyptic number.

It is an amenable number.

169781490456 is an abundant number, since it is smaller than the sum of its proper divisors (258874753944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169781490456 is a wasteful number, since it uses less digits than its factorization.

169781490456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70041979 (or 70041975 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 169781490456 in words is "one hundred sixty-nine billion, seven hundred eighty-one million, four hundred ninety thousand, four hundred fifty-six".