52697381578 has 4 divisors (see below), whose sum is σ = 79046072370. Its totient is φ = 26348690788.

The previous prime is 52697381563. The next prime is 52697381617. The reversal of 52697381578 is 87518379625.

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., 50020664409 + 2676717169 = 223653^2 + 51737^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13174345393 + ... + 13174345396.

Almost surely, 2^52697381578 is an apocalyptic number.

52697381578 is a deficient number, since it is larger than the sum of its proper divisors (26348690792).

52697381578 is a wasteful number, since it uses less digits than its factorization.

52697381578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26348690791.

The product of its digits is 25401600, while the sum is 61.

The spelling of 52697381578 in words is "fifty-two billion, six hundred ninety-seven million, three hundred eighty-one thousand, five hundred seventy-eight".