1505640969 has 12 divisors (see below), whose sum is σ = 2485502656. Its totient is φ = 860366232.

The previous prime is 1505640949. The next prime is 1505641043. The reversal of 1505640969 is 9690465051.

It is a happy number.

It is not a de Polignac number, because 1505640969 - 2¹¹ = 1505638921 is a prime.

It is a super-2 number, since 2×1505640969² = 4533909455062517922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1505640949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11949469 + ... + 11949594.

Almost surely, 2^1505640969 is an apocalyptic number.

It is an amenable number.

1505640969 is a deficient number, since it is larger than the sum of its proper divisors (979861687).

1505640969 is a wasteful number, since it uses less digits than its factorization.

1505640969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23899076 (or 23899073 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 1505640969 is about 38802.5897202751. The cubic root of 1505640969 is about 1146.1474025286.

The spelling of 1505640969 in words is "one billion, five hundred five million, six hundred forty thousand, nine hundred sixty-nine".