551657126437 has 4 divisors (see below), whose sum is σ = 551660353036. Its totient is φ = 551653899840.

The previous prime is 551657126387. The next prime is 551657126483. The reversal of 551657126437 is 734621756155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96051026241 + 455606100196 = 309921^2 + 674986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551657126437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551657106437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341588 + ... + 1703869.

It is an arithmetic number, because the mean of its divisors is an integer number (137915088259).

Almost surely, 2^551657126437 is an apocalyptic number.

It is an amenable number.

551657126437 is a deficient number, since it is larger than the sum of its proper divisors (3226599).

551657126437 is a wasteful number, since it uses less digits than its factorization.

551657126437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226598.

The product of its digits is 5292000, while the sum is 52.

The spelling of 551657126437 in words is "five hundred fifty-one billion, six hundred fifty-seven million, one hundred twenty-six thousand, four hundred thirty-seven".