990206862755 has 16 divisors (see below), whose sum is σ = 1372522027104. Its totient is φ = 677788654080.

The previous prime is 990206862751. The next prime is 990206862761. The reversal of 990206862755 is 557268602099.

It is not a de Polignac number, because 990206862755 - 2² = 990206862751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990206862694 and 990206862703.

It is not an unprimeable number, because it can be changed into a prime (990206862751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529521452 + ... + 529523321.

It is an arithmetic number, because the mean of its divisors is an integer number (85782626694).

Almost surely, 2^990206862755 is an apocalyptic number.

990206862755 is a deficient number, since it is larger than the sum of its proper divisors (382315164349).

990206862755 is a wasteful number, since it uses less digits than its factorization.

990206862755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059044806.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 990206862755 in words is "nine hundred ninety billion, two hundred six million, eight hundred sixty-two thousand, seven hundred fifty-five".