65310738991 has 4 divisors (see below), whose sum is σ = 65312101800. Its totient is φ = 65309376184.

The previous prime is 65310738953. The next prime is 65310739003. The reversal of 65310738991 is 19983701356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65310738991 - 2¹⁷ = 65310607919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65310738391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606796 + ... + 706273.

It is an arithmetic number, because the mean of its divisors is an integer number (16328025450).

Almost surely, 2^65310738991 is an apocalyptic number.

65310738991 is a deficient number, since it is larger than the sum of its proper divisors (1362809).

65310738991 is a wasteful number, since it uses less digits than its factorization.

65310738991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362808.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 65310738991 in words is "sixty-five billion, three hundred ten million, seven hundred thirty-eight thousand, nine hundred ninety-one".