1947774777492 has 48 divisors (see below), whose sum is σ = 4553418788352. Its totient is φ = 648028397280.

The previous prime is 1947774777353. The next prime is 1947774777511. The reversal of 1947774777492 is 2947774777491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104783023 + ... + 104801609.

It is an arithmetic number, because the mean of its divisors is an integer number (94862891424).

Almost surely, 2^{1947774777492} is an apocalyptic number.

1947774777492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1947774777492 is an abundant number, since it is smaller than the sum of its proper divisors (2605644010860).

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

1947774777492 is a wasteful number, since it uses less digits than its factorization.

1947774777492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34668 (or 34666 counting only the distinct ones).

The product of its digits is 1219784832, while the sum is 75.

Subtracting 1947774777492 from its reverse (2947774777491), we obtain a palindrome (999999999999).

The spelling of 1947774777492 in words is "one trillion, nine hundred forty-seven billion, seven hundred seventy-four million, seven hundred seventy-seven thousand, four hundred ninety-two".