1520640117 has 12 divisors (see below), whose sum is σ = 2267334784. Its totient is φ = 981057960.

The previous prime is 1520640113. The next prime is 1520640127. The reversal of 1520640117 is 7110460251.

It is a happy number.

1520640117 is a `hidden beast` number, since 1 + 5 + 2 + 0 + 640 + 1 + 17 = 666.

It is not a de Polignac number, because 1520640117 - 2² = 1520640113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520640113) 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, 2724883 + ... + 2725440.

Almost surely, 2^1520640117 is an apocalyptic number.

It is an amenable number.

1520640117 is a deficient number, since it is larger than the sum of its proper divisors (746694667).

1520640117 is a wasteful number, since it uses less digits than its factorization.

1520640117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450360 (or 5450357 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1520640117 is about 38995.3858424301. The cubic root of 1520640117 is about 1149.9407951877.

The spelling of 1520640117 in words is "one billion, five hundred twenty million, six hundred forty thousand, one hundred seventeen".