2649977397 has 16 divisors (see below), whose sum is σ = 3947832000. Its totient is φ = 1756778832.

The previous prime is 2649977377. The next prime is 2649977401. The reversal of 2649977397 is 7937799462.

It is not a de Polignac number, because 2649977397 - 2²⁷ = 2515759669 is a prime.

It is a super-2 number, since 2×2649977397² = 14044760409221791218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649977327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269322 + ... + 278987.

It is an arithmetic number, because the mean of its divisors is an integer number (246739500).

Almost surely, 2^2649977397 is an apocalyptic number.

2649977397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2649977397 is a deficient number, since it is larger than the sum of its proper divisors (1297854603).

2649977397 is a wasteful number, since it uses less digits than its factorization.

2649977397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548497 (or 548491 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 63.

The square root of 2649977397 is about 51477.9311647234. The cubic root of 2649977397 is about 1383.8235692115.

The spelling of 2649977397 in words is "two billion, six hundred forty-nine million, nine hundred seventy-seven thousand, three hundred ninety-seven".