2780117672 has 8 divisors (see below), whose sum is σ = 5212720650. Its totient is φ = 1390058832.

The previous prime is 2780117647. The next prime is 2780117693. The reversal of 2780117672 is 2767110872.

2780117672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2507405476 + 272712196 = 50074^2 + 16514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×2780117672⁴ (a number of 39 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173757347 + ... + 173757362.

Almost surely, 2^2780117672 is an apocalyptic number.

It is an amenable number.

2780117672 is a deficient number, since it is larger than the sum of its proper divisors (2432602978).

2780117672 is a wasteful number, since it uses less digits than its factorization.

2780117672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347514715 (or 347514711 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 2780117672 is about 52726.8211823926. The cubic root of 2780117672 is about 1406.1157067030.

The spelling of 2780117672 in words is "two billion, seven hundred eighty million, one hundred seventeen thousand, six hundred seventy-two".