2557038701778 has 64 divisors (see below), whose sum is σ = 5603265884160. Its totient is φ = 771490137600.

The previous prime is 2557038701761. The next prime is 2557038701839. The reversal of 2557038701778 is 8771078307552.

It is a super-2 number, since 2×2557038701778² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143960418 + ... + 143978178.

It is an arithmetic number, because the mean of its divisors is an integer number (87551029440).

Almost surely, 2^{2557038701778} is an apocalyptic number.

2557038701778 is an abundant number, since it is smaller than the sum of its proper divisors (3046227182382).

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

2557038701778 is a wasteful number, since it uses less digits than its factorization.

2557038701778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27143.

The product of its (nonzero) digits is 23049600, while the sum is 60.

The spelling of 2557038701778 in words is "two trillion, five hundred fifty-seven billion, thirty-eight million, seven hundred one thousand, seven hundred seventy-eight".