690905233842 has 32 divisors (see below), whose sum is σ = 1390725642240. Its totient is φ = 228820235280.

The previous prime is 690905233841. The next prime is 690905233853. The reversal of 690905233842 is 248332509096.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (690905233841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91467 + ... + 1179057.

It is an arithmetic number, because the mean of its divisors is an integer number (43460176320).

Almost surely, 2^690905233842 is an apocalyptic number.

690905233842 is an abundant number, since it is smaller than the sum of its proper divisors (699820408398).

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

690905233842 is a wasteful number, since it uses less digits than its factorization.

690905233842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088278.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 690905233842 in words is "six hundred ninety billion, nine hundred five million, two hundred thirty-three thousand, eight hundred forty-two".