2534549661 has 24 divisors (see below), whose sum is σ = 4191405504. Its totient is φ = 1445757120.

The previous prime is 2534549657. The next prime is 2534549663. The reversal of 2534549661 is 1669454352.

2534549661 is a `hidden beast` number, since 2 + 53 + 454 + 96 + 61 = 666.

It is not a de Polignac number, because 2534549661 - 2² = 2534549657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2534549663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 745 + ... + 71201.

It is an arithmetic number, because the mean of its divisors is an integer number (174641896).

Almost surely, 2^2534549661 is an apocalyptic number.

2534549661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2534549661 is a deficient number, since it is larger than the sum of its proper divisors (1656855843).

2534549661 is a wasteful number, since it uses less digits than its factorization.

2534549661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71041 (or 71038 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 2534549661 is about 50344.3111086049. The cubic root of 2534549661 is about 1363.4323733636.

The spelling of 2534549661 in words is "two billion, five hundred thirty-four million, five hundred forty-nine thousand, six hundred sixty-one".