257050513747 has 4 divisors (see below), whose sum is σ = 257663999880. Its totient is φ = 256437027616.

The previous prime is 257050513663. The next prime is 257050513763. The reversal of 257050513747 is 747315050752.

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

It is a cyclic number.

It is not a de Polignac number, because 257050513747 - 2¹⁹ = 257049989459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257050513697 and 257050513706.

It is not an unprimeable number, because it can be changed into a prime (257050513777) 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, 306742438 + ... + 306743275.

It is an arithmetic number, because the mean of its divisors is an integer number (64415999970).

Almost surely, 2^257050513747 is an apocalyptic number.

257050513747 is a deficient number, since it is larger than the sum of its proper divisors (613486133).

257050513747 is an equidigital number, since it uses as much as digits as its factorization.

257050513747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613486132.

The product of its (nonzero) digits is 1029000, while the sum is 46.

The spelling of 257050513747 in words is "two hundred fifty-seven billion, fifty million, five hundred thirteen thousand, seven hundred forty-seven".