1902138543404 has 24 divisors (see below), whose sum is σ = 3822479371200. Its totient is φ = 819102721680.

The previous prime is 1902138543359. The next prime is 1902138543413. The reversal of 1902138543404 is 4043458312091.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137641834 + ... + 1137643505.

It is an arithmetic number, because the mean of its divisors is an integer number (159269973800).

Almost surely, 2^{1902138543404} is an apocalyptic number.

It is an amenable number.

1902138543404 is an abundant number, since it is smaller than the sum of its proper divisors (1920340827796).

1902138543404 is a wasteful number, since it uses less digits than its factorization.

1902138543404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275285373 (or 2275285371 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 1902138543404 in words is "one trillion, nine hundred two billion, one hundred thirty-eight million, five hundred forty-three thousand, four hundred four".