690612903981 has 96 divisors (see below), whose sum is σ = 1384120828160. Its totient is φ = 331162888320.

The previous prime is 690612903979. The next prime is 690612903989. The reversal of 690612903981 is 189309216096.

It is not a de Polignac number, because 690612903981 - 2¹ = 690612903979 is a prime.

It is a super-3 number, since 3×690612903981³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690612903989) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 864190 + ... + 1458783.

Almost surely, 2^690612903981 is an apocalyptic number.

It is an amenable number.

690612903981 is an abundant number, since it is smaller than the sum of its proper divisors (693507924179).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690612903981 is a wasteful number, since it uses less digits than its factorization.

690612903981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323024 (or 2323007 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 690612903981 in words is "six hundred ninety billion, six hundred twelve million, nine hundred three thousand, nine hundred eighty-one".