1520016685 has 8 divisors (see below), whose sum is σ = 1989840096. Its totient is φ = 1105466640.

The previous prime is 1520016677. The next prime is 1520016691. The reversal of 1520016685 is 5866100251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1520016685 - 2³ = 1520016677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520016685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13818279 + ... + 13818388.

It is an arithmetic number, because the mean of its divisors is an integer number (248730012).

Almost surely, 2^1520016685 is an apocalyptic number.

It is an amenable number.

1520016685 is a deficient number, since it is larger than the sum of its proper divisors (469823411).

1520016685 is a wasteful number, since it uses less digits than its factorization.

1520016685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27636683.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1520016685 is about 38987.3913592587. The cubic root of 1520016685 is about 1149.7836228064.

It can be divided in two parts, 15200166 and 85, that added together give a palindrome (15200251).

The spelling of 1520016685 in words is "one billion, five hundred twenty million, sixteen thousand, six hundred eighty-five".