1778255252 has 6 divisors (see below), whose sum is σ = 3111946698. Its totient is φ = 889127624.

The previous prime is 1778255249. The next prime is 1778255341. The reversal of 1778255252 is 2525528771.

It can be written as a sum of positive squares in only one way, i.e., 1635070096 + 143185156 = 40436^2 + 11966^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222281903 + ... + 222281910.

It is an arithmetic number, because the mean of its divisors is an integer number (518657783).

Almost surely, 2^1778255252 is an apocalyptic number.

It is an amenable number.

1778255252 is a deficient number, since it is larger than the sum of its proper divisors (1333691446).

1778255252 is a wasteful number, since it uses less digits than its factorization.

1778255252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444563817 (or 444563815 counting only the distinct ones).

The product of its digits is 392000, while the sum is 44.

The square root of 1778255252 is about 42169.3639031940. The cubic root of 1778255252 is about 1211.5221723770.

The spelling of 1778255252 in words is "one billion, seven hundred seventy-eight million, two hundred fifty-five thousand, two hundred fifty-two".