13455250640 has 80 divisors (see below), whose sum is σ = 34851675600. Its totient is φ = 4796768256.

The previous prime is 13455250607. The next prime is 13455250673. The reversal of 13455250640 is 4605255431.

It is an interprime number because it is at equal distance from previous prime (13455250607) and next prime (13455250673).

It can be written as a sum of positive squares in 8 ways, for example, as 86341264 + 13368909376 = 9292^2 + 115624^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 13455250640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192905 + ... + 253224.

It is an arithmetic number, because the mean of its divisors is an integer number (435645945).

Almost surely, 2^13455250640 is an apocalyptic number.

13455250640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13455250640 is an abundant number, since it is smaller than the sum of its proper divisors (21396424960).

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

13455250640 is a wasteful number, since it uses less digits than its factorization.

13455250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446184 (or 446178 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 13455250640 in words is "thirteen billion, four hundred fifty-five million, two hundred fifty thousand, six hundred forty".