1947978409596 has 24 divisors (see below), whose sum is σ = 4578460207440. Its totient is φ = 644586529152.

The previous prime is 1947978409591. The next prime is 1947978409609. The reversal of 1947978409596 is 6959048797491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947978409591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592449211 + ... + 592452498.

It is an arithmetic number, because the mean of its divisors is an integer number (190769175310).

Almost surely, 2^{1947978409596} is an apocalyptic number.

It is an amenable number.

1947978409596 is an abundant number, since it is smaller than the sum of its proper divisors (2630481797844).

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

1947978409596 is a wasteful number, since it uses less digits than its factorization.

1947978409596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184901853 (or 1184901851 counting only the distinct ones).

The product of its (nonzero) digits is 1234517760, while the sum is 78.

The spelling of 1947978409596 in words is "one trillion, nine hundred forty-seven billion, nine hundred seventy-eight million, four hundred nine thousand, five hundred ninety-six".