12540397802 has 8 divisors (see below), whose sum is σ = 18814410912. Its totient is φ = 6268927500.

The previous prime is 12540397763. The next prime is 12540397811. The reversal of 12540397802 is 20879304521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12540397802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623324 + ... + 643127.

It is an arithmetic number, because the mean of its divisors is an integer number (2351801364).

Almost surely, 2^12540397802 is an apocalyptic number.

12540397802 is a deficient number, since it is larger than the sum of its proper divisors (6274013110).

12540397802 is a wasteful number, since it uses less digits than its factorization.

12540397802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271404.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 12540397802 in words is "twelve billion, five hundred forty million, three hundred ninety-seven thousand, eight hundred two".