1515016749 has 4 divisors (see below), whose sum is σ = 2020022336. Its totient is φ = 1010011164.

The previous prime is 1515016729. The next prime is 1515016757. The reversal of 1515016749 is 9476105151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9476105151 = 3 ⋅3158701717.

It is not a de Polignac number, because 1515016749 - 2¹³ = 1515008557 is a prime.

It is a super-3 number, since 3×1515016749³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1515016709) 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, 252502789 + ... + 252502794.

It is an arithmetic number, because the mean of its divisors is an integer number (505005584).

Almost surely, 2^1515016749 is an apocalyptic number.

It is an amenable number.

1515016749 is a deficient number, since it is larger than the sum of its proper divisors (505005587).

1515016749 is an equidigital number, since it uses as much as digits as its factorization.

1515016749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505005586.

The product of its (nonzero) digits is 37800, while the sum is 39.

The square root of 1515016749 is about 38923.2160670210. The cubic root of 1515016749 is about 1148.5215402830.

The spelling of 1515016749 in words is "one billion, five hundred fifteen million, sixteen thousand, seven hundred forty-nine".