551901895801 has 27 divisors (see below), whose sum is σ = 572185440463. Its totient is φ = 532333140560.

The previous prime is 551901895793. The next prime is 551901895807. The reversal of 551901895801 is 108598109155.

It is a happy number.

The square root of 551901895801 is 742901.

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

It can be written as a sum of positive squares in only one way, i.e., 397864485225 + 154037410576 = 630765^2 + 392476^2 .

It is not a de Polignac number, because 551901895801 - 2³ = 551901895793 is a prime.

It is a super-2 number, since 2×551901895801² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551901895807) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4212991506 + ... + 4212991636.

Almost surely, 2^551901895801 is an apocalyptic number.

551901895801 is the 742901-st square number.

551901895801 is the 371451-st centered octagonal number.

It is an amenable number.

551901895801 is a deficient number, since it is larger than the sum of its proper divisors (20283544662).

551901895801 is an frugal number, since it uses more digits than its factorization.

551901895801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 52.

The spelling of 551901895801 in words is "five hundred fifty-one billion, nine hundred one million, eight hundred ninety-five thousand, eight hundred one".