690369952542 has 32 divisors (see below), whose sum is σ = 1418893600032. Its totient is φ = 223771705344.

The previous prime is 690369952529. The next prime is 690369952543. The reversal of 690369952542 is 245259963096.

690369952542 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690369952542² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690369952543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539523 + ... + 1292990.

It is an arithmetic number, because the mean of its divisors is an integer number (44340425001).

Almost surely, 2^690369952542 is an apocalyptic number.

690369952542 is an abundant number, since it is smaller than the sum of its proper divisors (728523647490).

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

690369952542 is a wasteful number, since it uses less digits than its factorization.

690369952542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834252.

The product of its (nonzero) digits is 31492800, while the sum is 60.

The spelling of 690369952542 in words is "six hundred ninety billion, three hundred sixty-nine million, nine hundred fifty-two thousand, five hundred forty-two".