257897427434 has 16 divisors (see below), whose sum is σ = 387432489696. Its totient is φ = 128753355600.

The previous prime is 257897427427. The next prime is 257897427439. The reversal of 257897427434 is 434724798752.

It is a super-2 number, since 2×257897427434² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257897427439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6267989 + ... + 6308999.

It is an arithmetic number, because the mean of its divisors is an integer number (24214530606).

Almost surely, 2^257897427434 is an apocalyptic number.

257897427434 is a deficient number, since it is larger than the sum of its proper divisors (129535062262).

257897427434 is a wasteful number, since it uses less digits than its factorization.

257897427434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45701.

The product of its digits is 94832640, while the sum is 62.

The spelling of 257897427434 in words is "two hundred fifty-seven billion, eight hundred ninety-seven million, four hundred twenty-seven thousand, four hundred thirty-four".