690138136811 has 4 divisors (see below), whose sum is σ = 690230175000. Its totient is φ = 690046098624.

The previous prime is 690138136801. The next prime is 690138136817. The reversal of 690138136811 is 118631831096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690138136811 - 2²² = 690133942507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690138136817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46007846 + ... + 46022843.

It is an arithmetic number, because the mean of its divisors is an integer number (172557543750).

Almost surely, 2^690138136811 is an apocalyptic number.

690138136811 is a deficient number, since it is larger than the sum of its proper divisors (92038189).

690138136811 is an equidigital number, since it uses as much as digits as its factorization.

690138136811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92038188.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 690138136811 in words is "six hundred ninety billion, one hundred thirty-eight million, one hundred thirty-six thousand, eight hundred eleven".