13123015016 has 8 divisors (see below), whose sum is σ = 24605653170. Its totient is φ = 6561507504.

The previous prime is 13123014977. The next prime is 13123015093. The reversal of 13123015016 is 61051032131.

It can be written as a sum of positive squares in only one way, i.e., 12556098916 + 566916100 = 112054^2 + 23810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13123015016² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13123014982 and 13123015000.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820188431 + ... + 820188446.

Almost surely, 2^13123015016 is an apocalyptic number.

It is an amenable number.

13123015016 is a deficient number, since it is larger than the sum of its proper divisors (11482638154).

13123015016 is a wasteful number, since it uses less digits than its factorization.

13123015016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640376883 (or 1640376879 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

Adding to 13123015016 its reverse (61051032131), we get a palindrome (74174047147).

The spelling of 13123015016 in words is "thirteen billion, one hundred twenty-three million, fifteen thousand, sixteen".