1827778002257 has 16 divisors (see below), whose sum is σ = 1840471249920. Its totient is φ = 1815126440400.

The previous prime is 1827778002209. The next prime is 1827778002277. The reversal of 1827778002257 is 7522008777281.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1827778002257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1827778002277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326911532 + ... + 326917122.

It is an arithmetic number, because the mean of its divisors is an integer number (115029453120).

Almost surely, 2^{1827778002257} is an apocalyptic number.

It is an amenable number.

1827778002257 is a deficient number, since it is larger than the sum of its proper divisors (12693247663).

1827778002257 is a wasteful number, since it uses less digits than its factorization.

1827778002257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8924.

The product of its (nonzero) digits is 6146560, while the sum is 56.

The spelling of 1827778002257 in words is "one trillion, eight hundred twenty-seven billion, seven hundred seventy-eight million, two thousand, two hundred fifty-seven".