1906238603556 has 243 divisors, whose sum is σ = 5697614136123. Its totient is φ = 535808861280.

The previous prime is 1906238603539. The next prime is 1906238603561. The reversal of 1906238603556 is 6553068326091.

It is a happy number.

The square root of 1906238603556 is 1380666.

It is a perfect power (a square), and thus also a powerful number.

1906238603556 is a `hidden beast` number, since 1 + 9 + 0 + 6 + 2 + 3 + 86 + 0 + 3 + 556 = 666.

It is a super-2 number, since 2×1906238603556² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4117145781 + ... + 4117146243.

Almost surely, 2^{1906238603556} is an apocalyptic number.

1906238603556 is the 1380666-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906238603556

1906238603556 is an abundant number, since it is smaller than the sum of its proper divisors (3791375532567).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1906238603556 is an equidigital number, since it uses as much as digits as its factorization.

1906238603556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 1906238603556 in words is "one trillion, nine hundred six billion, two hundred thirty-eight million, six hundred three thousand, five hundred fifty-six".