1612785513 has 4 divisors (see below), whose sum is σ = 2150380688. Its totient is φ = 1075190340.

The previous prime is 1612785487. The next prime is 1612785521. The reversal of 1612785513 is 3155872161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1612785513 - 2²⁵ = 1579231081 is a prime.

It is a super-2 number, since 2×1612785513² = 5202154221885346338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612785593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268797583 + ... + 268797588.

It is an arithmetic number, because the mean of its divisors is an integer number (537595172).

Almost surely, 2^1612785513 is an apocalyptic number.

It is an amenable number.

1612785513 is a deficient number, since it is larger than the sum of its proper divisors (537595175).

1612785513 is an equidigital number, since it uses as much as digits as its factorization.

1612785513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537595174.

The product of its digits is 50400, while the sum is 39.

The square root of 1612785513 is about 40159.5009057633. The cubic root of 1612785513 is about 1172.7142557738.

The spelling of 1612785513 in words is "one billion, six hundred twelve million, seven hundred eighty-five thousand, five hundred thirteen".