1690424256340 has 12 divisors (see below), whose sum is σ = 3549890938356. Its totient is φ = 676169702528.

The previous prime is 1690424256277. The next prime is 1690424256341. The reversal of 1690424256340 is 436524240961.

It can be written as a sum of positive squares in 2 ways, for example, as 170909481744 + 1519514774596 = 413412^2 + 1232686^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690424256341) 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, 42260606389 + ... + 42260606428.

It is an arithmetic number, because the mean of its divisors is an integer number (295824244863).

Almost surely, 2^{1690424256340} is an apocalyptic number.

1690424256340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1690424256340 is an abundant number, since it is smaller than the sum of its proper divisors (1859466682016).

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

1690424256340 is a wasteful number, since it uses less digits than its factorization.

1690424256340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84521212826 (or 84521212824 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 1690424256340 in words is "one trillion, six hundred ninety billion, four hundred twenty-four million, two hundred fifty-six thousand, three hundred forty".