2757207981 has 8 divisors (see below), whose sum is σ = 4010484384. Its totient is φ = 1671035120.

The previous prime is 2757207967. The next prime is 2757207997. The reversal of 2757207981 is 1897027572.

It is a happy number.

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 2757207981 - 2¹¹ = 2757205933 is a prime.

It is a super-2 number, since 2×2757207981² = 15204391700980192722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2757207981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2757207911) 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, 41775846 + ... + 41775911.

It is an arithmetic number, because the mean of its divisors is an integer number (501310548).

Almost surely, 2^2757207981 is an apocalyptic number.

It is an amenable number.

2757207981 is a deficient number, since it is larger than the sum of its proper divisors (1253276403).

2757207981 is a wasteful number, since it uses less digits than its factorization.

2757207981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83551771.

The product of its (nonzero) digits is 493920, while the sum is 48.

The square root of 2757207981 is about 52509.1228359416. The cubic root of 2757207981 is about 1402.2426608341.

The spelling of 2757207981 in words is "two billion, seven hundred fifty-seven million, two hundred seven thousand, nine hundred eighty-one".