2778252997 has 8 divisors (see below), whose sum is σ = 2993560416. Its totient is φ = 2563173552.

The previous prime is 2778252977. The next prime is 2778253001. The reversal of 2778252997 is 7992528772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778252997 - 2²³ = 2769864389 is a prime.

It is a super-3 number, since 3×2778252997³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778252977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31243 + ... + 80824.

It is an arithmetic number, because the mean of its divisors is an integer number (374195052).

Almost surely, 2^2778252997 is an apocalyptic number.

It is an amenable number.

2778252997 is a deficient number, since it is larger than the sum of its proper divisors (215307419).

2778252997 is a wasteful number, since it uses less digits than its factorization.

2778252997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113987.

The product of its digits is 8890560, while the sum is 58.

The square root of 2778252997 is about 52709.1358020600. The cubic root of 2778252997 is about 1405.8012673483.

The spelling of 2778252997 in words is "two billion, seven hundred seventy-eight million, two hundred fifty-two thousand, nine hundred ninety-seven".