2540278247889 has 16 divisors (see below), whose sum is σ = 3616493202432. Its totient is φ = 1582215772368.

The previous prime is 2540278247887. The next prime is 2540278247921. The reversal of 2540278247889 is 9887428720452.

It is a happy number.

It is not a de Polignac number, because 2540278247889 - 2¹ = 2540278247887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2540278247887) 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, 428085717 + ... + 428091650.

It is an arithmetic number, because the mean of its divisors is an integer number (226030825152).

Almost surely, 2^{2540278247889} is an apocalyptic number.

It is an amenable number.

2540278247889 is a deficient number, since it is larger than the sum of its proper divisors (1076214954543).

2540278247889 is a wasteful number, since it uses less digits than its factorization.

2540278247889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856177436.

The product of its (nonzero) digits is 144506880, while the sum is 66.

The spelling of 2540278247889 in words is "two trillion, five hundred forty billion, two hundred seventy-eight million, two hundred forty-seven thousand, eight hundred eighty-nine".