399511010005551 has 24 divisors (see below), whose sum is σ = 585208929745440. Its totient is φ = 262585041969600.

The previous prime is 399511010005517. The next prime is 399511010005609. The reversal of 399511010005551 is 155500010115993.

399511010005551 is a `hidden beast` number, since 3 + 9 + 95 + 1 + 1 + 0 + 1 + 0 + 0 + 0 + 5 + 551 = 666.

It is not a de Polignac number, because 399511010005551 - 2⁷ = 399511010005423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399511010005497 and 399511010005506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399511010005501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33609045 + ... + 43915713.

It is an arithmetic number, because the mean of its divisors is an integer number (24383705406060).

Almost surely, 2^{399511010005551} is an apocalyptic number.

399511010005551 is a deficient number, since it is larger than the sum of its proper divisors (185697919739889).

399511010005551 is a wasteful number, since it uses less digits than its factorization.

399511010005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367407 (or 10367404 counting only the distinct ones).

The product of its (nonzero) digits is 151875, while the sum is 45.

The spelling of 399511010005551 in words is "three hundred ninety-nine trillion, five hundred eleven billion, ten million, five thousand, five hundred fifty-one".