65147296978 has 4 divisors (see below), whose sum is σ = 97720945470. Its totient is φ = 32573648488.

The previous prime is 65147296939. The next prime is 65147297011. The reversal of 65147296978 is 87969274156.

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., 58969808569 + 6177488409 = 242837^2 + 78597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16286824243 + ... + 16286824246.

Almost surely, 2^65147296978 is an apocalyptic number.

65147296978 is a deficient number, since it is larger than the sum of its proper divisors (32573648492).

65147296978 is a wasteful number, since it uses less digits than its factorization.

65147296978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32573648491.

The product of its digits is 45722880, while the sum is 64.

The spelling of 65147296978 in words is "sixty-five billion, one hundred forty-seven million, two hundred ninety-six thousand, nine hundred seventy-eight".