10401939887 has 4 divisors (see below), whose sum is σ = 10402488096. Its totient is φ = 10401391680.

The previous prime is 10401939883. The next prime is 10401939893. The reversal of 10401939887 is 78893910401.

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 10401939887 - 2² = 10401939883 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 (10401939883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244583 + ... + 283944.

It is an arithmetic number, because the mean of its divisors is an integer number (2600622024).

Almost surely, 2^10401939887 is an apocalyptic number.

10401939887 is a deficient number, since it is larger than the sum of its proper divisors (548209).

10401939887 is an equidigital number, since it uses as much as digits as its factorization.

10401939887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548208.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 10401939887 in words is "ten billion, four hundred one million, nine hundred thirty-nine thousand, eight hundred eighty-seven".