291478197040 has 80 divisors (see below), whose sum is σ = 680693352480. Its totient is φ = 116075151360.

The previous prime is 291478197029. The next prime is 291478197103. The reversal of 291478197040 is 40791874192.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17486310 + ... + 17502970.

It is an arithmetic number, because the mean of its divisors is an integer number (8508666906).

Almost surely, 2^291478197040 is an apocalyptic number.

291478197040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291478197040 is an abundant number, since it is smaller than the sum of its proper divisors (389215155440).

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

291478197040 is a wasteful number, since it uses less digits than its factorization.

291478197040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17630 (or 17624 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 291478197040 in words is "two hundred ninety-one billion, four hundred seventy-eight million, one hundred ninety-seven thousand, forty".