257072621550 has 24 divisors (see below), whose sum is σ = 637540101816. Its totient is φ = 68552699040.

The previous prime is 257072621527. The next prime is 257072621557. The reversal of 257072621550 is 55126270752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257072621557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856908589 + ... + 856908888.

It is an arithmetic number, because the mean of its divisors is an integer number (26564170909).

Almost surely, 2^257072621550 is an apocalyptic number.

257072621550 is an abundant number, since it is smaller than the sum of its proper divisors (380467480266).

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

257072621550 is a wasteful number, since it uses less digits than its factorization.

257072621550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713817492 (or 1713817487 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 257072621550 in words is "two hundred fifty-seven billion, seventy-two million, six hundred twenty-one thousand, five hundred fifty".