2731556545 has 16 divisors (see below), whose sum is σ = 3392928000. Its totient is φ = 2108628928.

The previous prime is 2731556507. The next prime is 2731556551. The reversal of 2731556545 is 5456551372.

It is a cyclic number.

It is not a de Polignac number, because 2731556545 - 2²¹ = 2729459393 is a prime.

It is a super-5 number, since 5×2731556545⁵ (a number of 48 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291036 + ... + 300274.

It is an arithmetic number, because the mean of its divisors is an integer number (212058000).

Almost surely, 2^2731556545 is an apocalyptic number.

It is an amenable number.

2731556545 is a deficient number, since it is larger than the sum of its proper divisors (661371455).

2731556545 is a wasteful number, since it uses less digits than its factorization.

2731556545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312.

The product of its digits is 630000, while the sum is 43.

The square root of 2731556545 is about 52264.2951258314. The cubic root of 2731556545 is about 1397.8805591832.

The spelling of 2731556545 in words is "two billion, seven hundred thirty-one million, five hundred fifty-six thousand, five hundred forty-five".