902139638399 has 4 divisors (see below), whose sum is σ = 910123175136. Its totient is φ = 894156101664.

The previous prime is 902139638363. The next prime is 902139638423. The reversal of 902139638399 is 993836931209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993836931209 = 320627 ⋅3099667.

It is a cyclic number.

It is not a de Polignac number, because 902139638399 - 2¹⁶ = 902139572863 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 (902139635399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3991768199 + ... + 3991768424.

It is an arithmetic number, because the mean of its divisors is an integer number (227530793784).

Almost surely, 2^902139638399 is an apocalyptic number.

902139638399 is a deficient number, since it is larger than the sum of its proper divisors (7983536737).

902139638399 is a wasteful number, since it uses less digits than its factorization.

902139638399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7983536736.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The spelling of 902139638399 in words is "nine hundred two billion, one hundred thirty-nine million, six hundred thirty-eight thousand, three hundred ninety-nine".