1949156638884 has 243 divisors, whose sum is σ = 6208671361347. Its totient is φ = 513862247808.

The previous prime is 1949156638873. The next prime is 1949156638927. The reversal of 1949156638884 is 4888366519491.

The square root of 1949156638884 is 1396122.

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

1949156638884 is a `hidden beast` number, since 1 + 9 + 491 + 56 + 6 + 3 + 8 + 8 + 84 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 386856632484 + 1562300006400 = 621978^2 + 1249920^2 .

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, 762281334 + ... + 762283890.

Almost surely, 2^{1949156638884} is an apocalyptic number.

1949156638884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1949156638884 is the 1396122-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949156638884

1949156638884 is an abundant number, since it is smaller than the sum of its proper divisors (4259514722463).

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

1949156638884 is a wasteful number, since it uses less digits than its factorization.

1949156638884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164 (or 2582 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 72.

The spelling of 1949156638884 in words is "one trillion, nine hundred forty-nine billion, one hundred fifty-six million, six hundred thirty-eight thousand, eight hundred eighty-four".