55261387838 has 16 divisors (see below), whose sum is σ = 83408016384. Its totient is φ = 27458793720.

The previous prime is 55261387837. The next prime is 55261387861. The reversal of 55261387838 is 83878316255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55261387837) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1609931 + ... + 1643897.

It is an arithmetic number, because the mean of its divisors is an integer number (5213001024).

Almost surely, 2^55261387838 is an apocalyptic number.

55261387838 is a deficient number, since it is larger than the sum of its proper divisors (28146628546).

55261387838 is a wasteful number, since it uses less digits than its factorization.

55261387838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39007.

The product of its digits is 9676800, while the sum is 56.

The spelling of 55261387838 in words is "fifty-five billion, two hundred sixty-one million, three hundred eighty-seven thousand, eight hundred thirty-eight".