251212426364 has 24 divisors (see below), whose sum is σ = 440204700768. Its totient is φ = 125439736320.

The previous prime is 251212426363. The next prime is 251212426373. The reversal of 251212426364 is 463624212152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251212426363) 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, 16527152 + ... + 16542344.

It is an arithmetic number, because the mean of its divisors is an integer number (18341862532).

Almost surely, 2^251212426364 is an apocalyptic number.

It is an amenable number.

251212426364 is a deficient number, since it is larger than the sum of its proper divisors (188992274404).

251212426364 is a wasteful number, since it uses less digits than its factorization.

251212426364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20405 (or 20403 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The spelling of 251212426364 in words is "two hundred fifty-one billion, two hundred twelve million, four hundred twenty-six thousand, three hundred sixty-four".