5455257781 has 4 divisors (see below), whose sum is σ = 5455507564. Its totient is φ = 5455008000.

The previous prime is 5455257779. The next prime is 5455257793. The reversal of 5455257781 is 1877525545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1562620900 + 3892636881 = 39530^2 + 62391^2 .

It is a cyclic number.

It is not a de Polignac number, because 5455257781 - 2¹ = 5455257779 is a prime.

It is a super-2 number, since 2×5455257781² = 59519674914322087922, which contains 22 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 (5455257761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88620 + ... + 136981.

It is an arithmetic number, because the mean of its divisors is an integer number (1363876891).

Almost surely, 2^5455257781 is an apocalyptic number.

It is an amenable number.

5455257781 is a deficient number, since it is larger than the sum of its proper divisors (249783).

5455257781 is a wasteful number, since it uses less digits than its factorization.

5455257781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249782.

The product of its digits is 1960000, while the sum is 49.

The square root of 5455257781 is about 73859.7169030589. The cubic root of 5455257781 is about 1760.3745953909.

The spelling of 5455257781 in words is "five billion, four hundred fifty-five million, two hundred fifty-seven thousand, seven hundred eighty-one".