1025502778338 has 32 divisors (see below), whose sum is σ = 2069708760000. Its totient is φ = 338718675456.

The previous prime is 1025502778309. The next prime is 1025502778361. The reversal of 1025502778338 is 8338772055201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2362038 + ... + 2762286.

It is an arithmetic number, because the mean of its divisors is an integer number (64678398750).

Almost surely, 2^{1025502778338} is an apocalyptic number.

1025502778338 is an abundant number, since it is smaller than the sum of its proper divisors (1044205981662).

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

1025502778338 is a wasteful number, since it uses less digits than its factorization.

1025502778338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404146.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 1025502778338 in words is "one trillion, twenty-five billion, five hundred two million, seven hundred seventy-eight thousand, three hundred thirty-eight".