1513664761 has 4 divisors (see below), whose sum is σ = 1729902592. Its totient is φ = 1297426932.

The previous prime is 1513664749. The next prime is 1513664813. The reversal of 1513664761 is 1674663151.

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 a cyclic number.

It is not a de Polignac number, because 1513664761 - 2¹⁷ = 1513533689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1513664461) 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, 108118905 + ... + 108118918.

It is an arithmetic number, because the mean of its divisors is an integer number (432475648).

Almost surely, 2^1513664761 is an apocalyptic number.

It is an amenable number.

1513664761 is a deficient number, since it is larger than the sum of its proper divisors (216237831).

1513664761 is an equidigital number, since it uses as much as digits as its factorization.

1513664761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216237830.

The product of its digits is 90720, while the sum is 40.

The square root of 1513664761 is about 38905.8448179705. The cubic root of 1513664761 is about 1148.1797950034.

It can be divided in two parts, 15136 and 64761, that added together give a palindrome (79897).

The spelling of 1513664761 in words is "one billion, five hundred thirteen million, six hundred sixty-four thousand, seven hundred sixty-one".