7455844861138 has 4 divisors (see below), whose sum is σ = 11183767291710. Its totient is φ = 3727922430568.

The previous prime is 7455844861051. The next prime is 7455844861219. The reversal of 7455844861138 is 8311684485547.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4282056291969 + 3173788569169 = 2069313^2 + 1781513^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7455844861138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1863961215283 + ... + 1863961215286.

Almost surely, 2^{7455844861138} is an apocalyptic number.

7455844861138 is a deficient number, since it is larger than the sum of its proper divisors (3727922430572).

7455844861138 is a wasteful number, since it uses less digits than its factorization.

7455844861138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727922430571.

The product of its digits is 103219200, while the sum is 64.

The spelling of 7455844861138 in words is "seven trillion, four hundred fifty-five billion, eight hundred forty-four million, eight hundred sixty-one thousand, one hundred thirty-eight".