291478453799 has 32 divisors (see below), whose sum is σ = 327269268480. Its totient is φ = 257875083648.

The previous prime is 291478453781. The next prime is 291478453811. The reversal of 291478453799 is 997354874192.

It is not a de Polignac number, because 291478453799 - 2¹⁶ = 291478388263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291478453099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7177997 + ... + 7218489.

It is an arithmetic number, because the mean of its divisors is an integer number (10227164640).

Almost surely, 2^291478453799 is an apocalyptic number.

291478453799 is a deficient number, since it is larger than the sum of its proper divisors (35790814681).

291478453799 is a wasteful number, since it uses less digits than its factorization.

291478453799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40791.

The product of its digits is 137168640, while the sum is 68.

The spelling of 291478453799 in words is "two hundred ninety-one billion, four hundred seventy-eight million, four hundred fifty-three thousand, seven hundred ninety-nine".