1902138405674 has 24 divisors (see below), whose sum is σ = 3182293421580. Its totient is φ = 847637263872.

The previous prime is 1902138405613. The next prime is 1902138405683. The reversal of 1902138405674 is 4765048312091.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1102174524025 + 799963881649 = 1049845^2 + 894407^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43473479 + ... + 43517210.

It is a 1-persistent number, because it is pandigital, but 2⋅1902138405674 = 3804276811348 is not.

Almost surely, 2^{1902138405674} is an apocalyptic number.

1902138405674 is a deficient number, since it is larger than the sum of its proper divisors (1280155015906).

1902138405674 is a wasteful number, since it uses less digits than its factorization.

1902138405674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86990762 (or 86990733 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 1902138405674 in words is "one trillion, nine hundred two billion, one hundred thirty-eight million, four hundred five thousand, six hundred seventy-four".