13106502640 has 80 divisors (see below), whose sum is σ = 37991854080. Its totient is φ = 4085141760.

The previous prime is 13106502593. The next prime is 13106502649. The reversal of 13106502640 is 4620560131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13106502640² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 13106502599 and 13106502608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13106502649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057680 + ... + 1069999.

It is an arithmetic number, because the mean of its divisors is an integer number (474898176).

Almost surely, 2^13106502640 is an apocalyptic number.

13106502640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13106502640 is an abundant number, since it is smaller than the sum of its proper divisors (24885351440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13106502640 is a wasteful number, since it uses less digits than its factorization.

13106502640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127710 (or 2127704 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 13106502640 in words is "thirteen billion, one hundred six million, five hundred two thousand, six hundred forty".