840401493915 has 64 divisors (see below), whose sum is σ = 1444794624000. Its totient is φ = 415651129344.

The previous prime is 840401493829. The next prime is 840401493917. The reversal of 840401493915 is 519394104048.

It is a happy number.

It is not a de Polignac number, because 840401493915 - 2¹⁶ = 840401428379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840401493917) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5146341 + ... + 5307129.

It is an arithmetic number, because the mean of its divisors is an integer number (22574916000).

Almost surely, 2^840401493915 is an apocalyptic number.

840401493915 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

840401493915 is a deficient number, since it is larger than the sum of its proper divisors (604393130085).

840401493915 is a wasteful number, since it uses less digits than its factorization.

840401493915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161116.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 840401493915 in words is "eight hundred forty billion, four hundred one million, four hundred ninety-three thousand, nine hundred fifteen".