251012242646 has 32 divisors (see below), whose sum is σ = 449905790880. Its totient is φ = 103681984000.

The previous prime is 251012242643. The next prime is 251012242651. The reversal of 251012242646 is 646242210152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251012242643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11560805 + ... + 11582496.

It is an arithmetic number, because the mean of its divisors is an integer number (14059555965).

Almost surely, 2^251012242646 is an apocalyptic number.

251012242646 is a deficient number, since it is larger than the sum of its proper divisors (198893548234).

251012242646 is a wasteful number, since it uses less digits than its factorization.

251012242646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23143360.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 251012242646 its reverse (646242210152), we get a palindrome (897254452798).

The spelling of 251012242646 in words is "two hundred fifty-one billion, twelve million, two hundred forty-two thousand, six hundred forty-six".