32487831697978 has 4 divisors (see below), whose sum is σ = 48731747546970. Its totient is φ = 16243915848988.

The previous prime is 32487831697969. The next prime is 32487831697999. The reversal of 32487831697978 is 87979613878423.

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., 26803741536289 + 5684090161689 = 5177233^2 + 2384133^2 .

It is a super-2 number, since 2×32487831697978² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8121957924493 + ... + 8121957924496.

Almost surely, 2^{32487831697978} is an apocalyptic number.

32487831697978 is a deficient number, since it is larger than the sum of its proper divisors (16243915848992).

32487831697978 is a wasteful number, since it uses less digits than its factorization.

32487831697978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16243915848991.

The product of its digits is 6145155072, while the sum is 82.

The spelling of 32487831697978 in words is "thirty-two trillion, four hundred eighty-seven billion, eight hundred thirty-one million, six hundred ninety-seven thousand, nine hundred seventy-eight".