551507398827 has 48 divisors (see below), whose sum is σ = 927880181760. Its totient is φ = 285212315520.

The previous prime is 551507398817. The next prime is 551507398837. The reversal of 551507398827 is 728893705155.

It is an interprime number because it is at equal distance from previous prime (551507398817) and next prime (551507398837).

It is not a de Polignac number, because 551507398827 - 2¹⁹ = 551506874539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551507398807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79999 + ... + 1053287.

It is an arithmetic number, because the mean of its divisors is an integer number (19330837120).

Almost surely, 2^551507398827 is an apocalyptic number.

551507398827 is a deficient number, since it is larger than the sum of its proper divisors (376372782933).

551507398827 is a wasteful number, since it uses less digits than its factorization.

551507398827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973544 (or 973533 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 60.

The spelling of 551507398827 in words is "five hundred fifty-one billion, five hundred seven million, three hundred ninety-eight thousand, eight hundred twenty-seven".