1900902438356 has 6 divisors (see below), whose sum is σ = 3326579267130. Its totient is φ = 950451219176.

The previous prime is 1900902438341. The next prime is 1900902438359. The reversal of 1900902438356 is 6538342090091.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1179873888400 + 721028549956 = 1086220^2 + 849134^2 .

It is a super-2 number, since 2×1900902438356² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900902438359) 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 as a sum of consecutive naturals, namely, 237612804791 + ... + 237612804798.

It is an arithmetic number, because the mean of its divisors is an integer number (554429877855).

Almost surely, 2^{1900902438356} is an apocalyptic number.

It is an amenable number.

1900902438356 is a deficient number, since it is larger than the sum of its proper divisors (1425676828774).

1900902438356 is a wasteful number, since it uses less digits than its factorization.

1900902438356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475225609593 (or 475225609591 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 1900902438356 in words is "one trillion, nine hundred billion, nine hundred two million, four hundred thirty-eight thousand, three hundred fifty-six".