690636935142 has 128 divisors (see below), whose sum is σ = 1917897523200. Its totient is φ = 178969543200.

The previous prime is 690636935129. The next prime is 690636935143. The reversal of 690636935142 is 241539636096.

690636935142 is a `hidden beast` number, since 6 + 9 + 0 + 6 + 36 + 93 + 514 + 2 = 666.

It is a super-2 number, since 2×690636935142² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690636935143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1599409 + ... + 1984787.

It is an arithmetic number, because the mean of its divisors is an integer number (14983574400).

Almost surely, 2^690636935142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690636935142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958948761600).

690636935142 is an abundant number, since it is smaller than the sum of its proper divisors (1227260588058).

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

690636935142 is a wasteful number, since it uses less digits than its factorization.

690636935142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385839 (or 385833 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 690636935142 in words is "six hundred ninety billion, six hundred thirty-six million, nine hundred thirty-five thousand, one hundred forty-two".