65223978261 has 8 divisors (see below), whose sum is σ = 93654943200. Its totient is φ = 40137832752.

The previous prime is 65223978233. The next prime is 65223978317. The reversal of 65223978261 is 16287932256.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65223978261 - 2²⁶ = 65156869397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65223971261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836204811 + ... + 836204888.

It is an arithmetic number, because the mean of its divisors is an integer number (11706867900).

Almost surely, 2^65223978261 is an apocalyptic number.

It is an amenable number.

65223978261 is a deficient number, since it is larger than the sum of its proper divisors (28430964939).

65223978261 is a wasteful number, since it uses less digits than its factorization.

65223978261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672409715.

The product of its digits is 2177280, while the sum is 51.

The spelling of 65223978261 in words is "sixty-five billion, two hundred twenty-three million, nine hundred seventy-eight thousand, two hundred sixty-one".