275664073978 has 4 divisors (see below), whose sum is σ = 413496110970. Its totient is φ = 137832036988.

The previous prime is 275664073963. The next prime is 275664074027. The reversal of 275664073978 is 879370466572.

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., 218568405169 + 57095668809 = 467513^2 + 238947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68916018493 + ... + 68916018496.

Almost surely, 2^275664073978 is an apocalyptic number.

275664073978 is a deficient number, since it is larger than the sum of its proper divisors (137832036992).

275664073978 is a wasteful number, since it uses less digits than its factorization.

275664073978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137832036991.

The product of its (nonzero) digits is 106686720, while the sum is 64.

The spelling of 275664073978 in words is "two hundred seventy-five billion, six hundred sixty-four million, seventy-three thousand, nine hundred seventy-eight".