151689690 has 24 divisors (see below), whose sum is σ = 394393428. Its totient is φ = 40450560.

The previous prime is 151689683. The next prime is 151689743. The reversal of 151689690 is 96986151.

It can be written as a sum of positive squares in 2 ways, for example, as 150773841 + 915849 = 12279^2 + 957^2 .

It is a super-2 number, since 2×151689690² = 46019524104592200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 842631 + ... + 842810.

Almost surely, 2^151689690 is an apocalyptic number.

151689690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151689690 is an abundant number, since it is smaller than the sum of its proper divisors (242703738).

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

151689690 is a wasteful number, since it uses less digits than its factorization.

151689690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685454 (or 1685451 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 151689690 is about 12316.2368441014. The cubic root of 151689690 is about 533.3169105186.

The spelling of 151689690 in words is "one hundred fifty-one million, six hundred eighty-nine thousand, six hundred ninety".