257348027730 has 16 divisors (see below), whose sum is σ = 617635266624. Its totient is φ = 68626140720.

The previous prime is 257348027719. The next prime is 257348027771. The reversal of 257348027730 is 37720843752.

It is a self number, because there is not a number n which added to its sum of digits gives 257348027730.

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, 4289133766 + ... + 4289133825.

It is an arithmetic number, because the mean of its divisors is an integer number (38602204164).

Almost surely, 2^257348027730 is an apocalyptic number.

257348027730 is an abundant number, since it is smaller than the sum of its proper divisors (360287238894).

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

257348027730 is a wasteful number, since it uses less digits than its factorization.

257348027730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578267601.

The product of its (nonzero) digits is 1975680, while the sum is 48.

The spelling of 257348027730 in words is "two hundred fifty-seven billion, three hundred forty-eight million, twenty-seven thousand, seven hundred thirty".