551106405649 has 2 divisors, whose sum is σ = 551106405650. Its totient is φ = 551106405648.

The previous prime is 551106405623. The next prime is 551106405667. The reversal of 551106405649 is 946504601155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344451610000 + 206654795649 = 586900^2 + 454593^2 .

It is a cyclic number.

It is not a de Polignac number, because 551106405649 - 2⁹ = 551106405137 is a prime.

It is a super-2 number, since 2×551106405649² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551106405599 and 551106405608.

It is not a weakly prime, because it can be changed into another prime (551106405749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275553202824 + 275553202825.

It is an arithmetic number, because the mean of its divisors is an integer number (275553202825).

Almost surely, 2^551106405649 is an apocalyptic number.

It is an amenable number.

551106405649 is a deficient number, since it is larger than the sum of its proper divisors (1).

551106405649 is an equidigital number, since it uses as much as digits as its factorization.

551106405649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 551106405649 in words is "five hundred fifty-one billion, one hundred six million, four hundred five thousand, six hundred forty-nine".