551375380081 has 2 divisors, whose sum is σ = 551375380082. Its totient is φ = 551375380080.

The previous prime is 551375380069. The next prime is 551375380121. The reversal of 551375380081 is 180083573155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391395379456 + 159980000625 = 625616^2 + 399975^2 .

It is a cyclic number.

It is not a de Polignac number, because 551375380081 - 2⁷ = 551375379953 is a prime.

It is a super-2 number, since 2×551375380081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (551375380681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275687690040 + 275687690041.

It is an arithmetic number, because the mean of its divisors is an integer number (275687690041).

Almost surely, 2^551375380081 is an apocalyptic number.

It is an amenable number.

551375380081 is a deficient number, since it is larger than the sum of its proper divisors (1).

551375380081 is an equidigital number, since it uses as much as digits as its factorization.

551375380081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 551375380081 in words is "five hundred fifty-one billion, three hundred seventy-five million, three hundred eighty thousand, eighty-one".