75551101638 has 16 divisors (see below), whose sum is σ = 157671864576. Its totient is φ = 24088757000.

The previous prime is 75551101621. The next prime is 75551101651. The reversal of 75551101638 is 83610115557.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 75551101638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273735738 + ... + 273736013.

It is an arithmetic number, because the mean of its divisors is an integer number (9854491536).

Almost surely, 2^75551101638 is an apocalyptic number.

75551101638 is an abundant number, since it is smaller than the sum of its proper divisors (82120762938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75551101638 is a wasteful number, since it uses less digits than its factorization.

75551101638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547471779.

The product of its (nonzero) digits is 126000, while the sum is 42.

The spelling of 75551101638 in words is "seventy-five billion, five hundred fifty-one million, one hundred one thousand, six hundred thirty-eight".