538157864078 has 4 divisors (see below), whose sum is σ = 807236796120. Its totient is φ = 269078932038.

The previous prime is 538157864077. The next prime is 538157864107. The reversal of 538157864078 is 870468751835.

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

It is a super-2 number, since 2×538157864078² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 538157864078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538157864077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134539466018 + ... + 134539466021.

It is an arithmetic number, because the mean of its divisors is an integer number (201809199030).

Almost surely, 2^538157864078 is an apocalyptic number.

538157864078 is a deficient number, since it is larger than the sum of its proper divisors (269078932042).

538157864078 is a wasteful number, since it uses less digits than its factorization.

538157864078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269078932041.

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 538157864078 in words is "five hundred thirty-eight billion, one hundred fifty-seven million, eight hundred sixty-four thousand, seventy-eight".