257415780086 has 4 divisors (see below), whose sum is σ = 386123670132. Its totient is φ = 128707890042.

The previous prime is 257415780079. The next prime is 257415780109. The reversal of 257415780086 is 680087514752.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64353945020 + ... + 64353945023.

It is an arithmetic number, because the mean of its divisors is an integer number (96530917533).

Almost surely, 2^257415780086 is an apocalyptic number.

257415780086 is a deficient number, since it is larger than the sum of its proper divisors (128707890046).

257415780086 is a wasteful number, since it uses less digits than its factorization.

257415780086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128707890045.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 257415780086 in words is "two hundred fifty-seven billion, four hundred fifteen million, seven hundred eighty thousand, eighty-six".