2556781354 has 8 divisors (see below), whose sum is σ = 3842984448. Its totient is φ = 1275786540.

The previous prime is 2556781349. The next prime is 2556781373. The reversal of 2556781354 is 4531876552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300842 + ... + 1302805.

It is an arithmetic number, because the mean of its divisors is an integer number (480373056).

Almost surely, 2^2556781354 is an apocalyptic number.

2556781354 is a deficient number, since it is larger than the sum of its proper divisors (1286203094).

2556781354 is a wasteful number, since it uses less digits than its factorization.

2556781354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604140.

The product of its digits is 1008000, while the sum is 46.

The square root of 2556781354 is about 50564.6255202192. The cubic root of 2556781354 is about 1367.4072036467.

The spelling of 2556781354 in words is "two billion, five hundred fifty-six million, seven hundred eighty-one thousand, three hundred fifty-four".