1516655493 has 24 divisors (see below), whose sum is σ = 2382291288. Its totient is φ = 925903872.

The previous prime is 1516655479. The next prime is 1516655531. The reversal of 1516655493 is 3945566151.

1516655493 is a `hidden beast` number, since 1 + 5 + 1 + 6 + 6 + 554 + 93 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 366224769 + 1150430724 = 19137^2 + 33918^2 .

It is not a de Polignac number, because 1516655493 - 2⁵ = 1516655461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516655893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128296 + ... + 139617.

It is an arithmetic number, because the mean of its divisors is an integer number (99262137).

Almost surely, 2^1516655493 is an apocalyptic number.

It is an amenable number.

1516655493 is a deficient number, since it is larger than the sum of its proper divisors (865635795).

1516655493 is a wasteful number, since it uses less digits than its factorization.

1516655493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267973 (or 267970 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 1516655493 is about 38944.2613615922. The cubic root of 1516655493 is about 1148.9354971096.

The spelling of 1516655493 in words is "one billion, five hundred sixteen million, six hundred fifty-five thousand, four hundred ninety-three".