2649741856 has 36 divisors (see below), whose sum is σ = 5526046638. Its totient is φ = 1246372352.

The previous prime is 2649741821. The next prime is 2649741863. The reversal of 2649741856 is 6581479462.

It can be written as a sum of positive squares in only one way, i.e., 1948339600 + 701402256 = 44140^2 + 26484^2 .

It is a super-2 number, since 2×2649741856² = 14042263806876649472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1199505 + ... + 1201711.

Almost surely, 2^2649741856 is an apocalyptic number.

It is an amenable number.

2649741856 is an abundant number, since it is smaller than the sum of its proper divisors (2876304782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2649741856 is an frugal number, since it uses more digits than its factorization.

2649741856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441 (or 2226 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 2649741856 is about 51475.6433276943. The cubic root of 2649741856 is about 1383.7825680008.

The spelling of 2649741856 in words is "two billion, six hundred forty-nine million, seven hundred forty-one thousand, eight hundred fifty-six".