2775554997 has 16 divisors (see below), whose sum is σ = 4053551040. Its totient is φ = 1681471232.

The previous prime is 2775554989. The next prime is 2775555001. The reversal of 2775554997 is 7994555772.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2775554997 - 2³ = 2775554989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2775554997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775554597) 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, 936843 + ... + 939800.

It is an arithmetic number, because the mean of its divisors is an integer number (253346940).

Almost surely, 2^2775554997 is an apocalyptic number.

It is an amenable number.

2775554997 is a deficient number, since it is larger than the sum of its proper divisors (1277996043).

2775554997 is a wasteful number, since it uses less digits than its factorization.

2775554997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876692.

The product of its digits is 27783000, while the sum is 60.

The square root of 2775554997 is about 52683.5362993032. The cubic root of 2775554997 is about 1405.3460555960.

The spelling of 2775554997 in words is "two billion, seven hundred seventy-five million, five hundred fifty-four thousand, nine hundred ninety-seven".