64516562123 has 4 divisors (see below), whose sum is σ = 69479374608. Its totient is φ = 59553749640.

The previous prime is 64516562119. The next prime is 64516562161. The reversal of 64516562123 is 32126561546.

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 64516562123 - 2² = 64516562119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64516562723) 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, 2481406223 + ... + 2481406248.

It is an arithmetic number, because the mean of its divisors is an integer number (17369843652).

Almost surely, 2^64516562123 is an apocalyptic number.

64516562123 is a deficient number, since it is larger than the sum of its proper divisors (4962812485).

64516562123 is a wasteful number, since it uses less digits than its factorization.

64516562123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962812484.

The product of its digits is 259200, while the sum is 41.

The spelling of 64516562123 in words is "sixty-four billion, five hundred sixteen million, five hundred sixty-two thousand, one hundred twenty-three".