690946549181 has 4 divisors (see below), whose sum is σ = 789653199072. Its totient is φ = 592239899292.

The previous prime is 690946549171. The next prime is 690946549201. The reversal of 690946549181 is 181945649096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690946549181 - 2³⁸ = 416068642237 is a prime.

It is a super-2 number, since 2×690946549181² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690946549121) 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, 49353324935 + ... + 49353324948.

It is an arithmetic number, because the mean of its divisors is an integer number (197413299768).

Almost surely, 2^690946549181 is an apocalyptic number.

It is an amenable number.

690946549181 is a deficient number, since it is larger than the sum of its proper divisors (98706649891).

690946549181 is an equidigital number, since it uses as much as digits as its factorization.

690946549181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98706649890.

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 690946549181 in words is "six hundred ninety billion, nine hundred forty-six million, five hundred forty-nine thousand, one hundred eighty-one".