1402878787639 has 4 divisors (see below), whose sum is σ = 1603290043024. Its totient is φ = 1202467532256.

The previous prime is 1402878787613. The next prime is 1402878787669. The reversal of 1402878787639 is 9367878782041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1402878787639 - 2⁹ = 1402878787127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402878787669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100205627682 + ... + 100205627695.

It is an arithmetic number, because the mean of its divisors is an integer number (400822510756).

Almost surely, 2^{1402878787639} is an apocalyptic number.

1402878787639 is a deficient number, since it is larger than the sum of its proper divisors (200411255385).

1402878787639 is an equidigital number, since it uses as much as digits as its factorization.

1402878787639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200411255384.

The product of its (nonzero) digits is 227598336, while the sum is 70.

The spelling of 1402878787639 in words is "one trillion, four hundred two billion, eight hundred seventy-eight million, seven hundred eighty-seven thousand, six hundred thirty-nine".