2691270549 has 128 divisors (see below), whose sum is σ = 4777574400. Its totient is φ = 1480248000.

The previous prime is 2691270511. The next prime is 2691270553. The reversal of 2691270549 is 9450721962.

2691270549 is a `hidden beast` number, since 26 + 9 + 12 + 70 + 549 = 666.

It is not a de Polignac number, because 2691270549 - 2²⁰ = 2690221973 is a prime.

It is a super-4 number, since 4×2691270549⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691270559) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15034942 + ... + 15035120.

It is an arithmetic number, because the mean of its divisors is an integer number (37324800).

Almost surely, 2^2691270549 is an apocalyptic number.

It is an amenable number.

2691270549 is a deficient number, since it is larger than the sum of its proper divisors (2086303851).

2691270549 is a wasteful number, since it uses less digits than its factorization.

2691270549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 2691270549 is about 51877.4570406068. The cubic root of 2691270549 is about 1390.9743438577.

It can be divided in two parts, 26912 and 70549, that added together give a triangular number (97461 = T₄₄₁).

The spelling of 2691270549 in words is "two billion, six hundred ninety-one million, two hundred seventy thousand, five hundred forty-nine".