65140623 has 24 divisors (see below), whose sum is σ = 98942688. Its totient is φ = 41217792.

The previous prime is 65140597. The next prime is 65140627. The reversal of 65140623 is 32604156.

65140623 is a `hidden beast` number, since 651 + 4 + 0 + 6 + 2 + 3 = 666.

It is not a de Polignac number, because 65140623 - 2⁵ = 65140591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27211 + ... + 29507.

It is an arithmetic number, because the mean of its divisors is an integer number (4122612).

Almost surely, 2^65140623 is an apocalyptic number.

65140623 is a deficient number, since it is larger than the sum of its proper divisors (33802065).

65140623 is a wasteful number, since it uses less digits than its factorization.

65140623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 65140623 is about 8070.9741047782. The cubic root of 65140623 is about 402.3623190735.

Adding to 65140623 its reverse (32604156), we get a palindrome (97744779).

The spelling of 65140623 in words is "sixty-five million, one hundred forty thousand, six hundred twenty-three".