539241965978 has 4 divisors (see below), whose sum is σ = 808862948970. Its totient is φ = 269620982988.

The previous prime is 539241965923. The next prime is 539241965981. The reversal of 539241965978 is 879569142935.

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., 538804445089 + 437520889 = 734033^2 + 20917^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134810491493 + ... + 134810491496.

Almost surely, 2^539241965978 is an apocalyptic number.

539241965978 is a deficient number, since it is larger than the sum of its proper divisors (269620982992).

539241965978 is a wasteful number, since it uses less digits than its factorization.

539241965978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269620982991.

The product of its digits is 146966400, while the sum is 68.

The spelling of 539241965978 in words is "five hundred thirty-nine billion, two hundred forty-one million, nine hundred sixty-five thousand, nine hundred seventy-eight".