551505257956 has 27 divisors (see below), whose sum is σ = 1018656364131. Its totient is φ = 261225965304.

The previous prime is 551505257917. The next prime is 551505257957. The reversal of 551505257956 is 659752505155.

The square root of 551505257956 is 742634.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×551505257956² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551505257897 and 551505257906.

It is not an unprimeable number, because it can be changed into a prime (551505257957) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28210321 + ... + 28229863.

Almost surely, 2^551505257956 is an apocalyptic number.

551505257956 is the 742634-th square number.

It is an amenable number.

551505257956 is a deficient number, since it is larger than the sum of its proper divisors (467151106175).

551505257956 is an frugal number, since it uses more digits than its factorization.

551505257956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39128 (or 19564 counting only the distinct ones).

The product of its (nonzero) digits is 11812500, while the sum is 55.

The spelling of 551505257956 in words is "five hundred fifty-one billion, five hundred five million, two hundred fifty-seven thousand, nine hundred fifty-six".