2745491517 has 48 divisors (see below), whose sum is σ = 4370550912. Its totient is φ = 1716318720.

The previous prime is 2745491467. The next prime is 2745491543. The reversal of 2745491517 is 7151945472.

2745491517 is a `hidden beast` number, since 2 + 7 + 45 + 4 + 91 + 517 = 666.

It is not a de Polignac number, because 2745491517 - 2¹¹ = 2745489469 is a prime.

It is a super-2 number, since 2×2745491517² = 15075447339837922578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745491557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1283673 + ... + 1285809.

It is an arithmetic number, because the mean of its divisors is an integer number (91053144).

Almost surely, 2^2745491517 is an apocalyptic number.

2745491517 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2745491517 is a deficient number, since it is larger than the sum of its proper divisors (1625059395).

2745491517 is a wasteful number, since it uses less digits than its factorization.

2745491517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2468 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 2745491517 is about 52397.4380766846. The cubic root of 2745491517 is about 1400.2536134083.

The spelling of 2745491517 in words is "two billion, seven hundred forty-five million, four hundred ninety-one thousand, five hundred seventeen".