1979140973840 has 40 divisors (see below), whose sum is σ = 4670181922560. Its totient is φ = 779840620416.

The previous prime is 1979140973839. The next prime is 1979140973983. The reversal of 1979140973840 is 483790419791.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184616000 + ... + 184626719.

It is an arithmetic number, because the mean of its divisors is an integer number (116754548064).

Almost surely, 2^{1979140973840} is an apocalyptic number.

1979140973840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979140973840 is an abundant number, since it is smaller than the sum of its proper divisors (2691040948720).

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

1979140973840 is a wasteful number, since it uses less digits than its factorization.

1979140973840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369242799 (or 369242793 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 1979140973840 in words is "one trillion, nine hundred seventy-nine billion, one hundred forty million, nine hundred seventy-three thousand, eight hundred forty".