251420134426612 has 6 divisors (see below), whose sum is σ = 439985235246578. Its totient is φ = 125710067213304.

The previous prime is 251420134426543. The next prime is 251420134426613. The reversal of 251420134426612 is 216624431024152.

It can be written as a sum of positive squares in only one way, i.e., 226809744521616 + 24610389904996 = 15060204^2 + 4960886^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251420134426613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31427516803323 + ... + 31427516803330.

Almost surely, 2^{251420134426612} is an apocalyptic number.

It is an amenable number.

251420134426612 is a deficient number, since it is larger than the sum of its proper divisors (188565100819966).

251420134426612 is a wasteful number, since it uses less digits than its factorization.

251420134426612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62855033606657 (or 62855033606655 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 251420134426612 in words is "two hundred fifty-one trillion, four hundred twenty billion, one hundred thirty-four million, four hundred twenty-six thousand, six hundred twelve".