391355228160 has 896 divisors, whose sum is σ = 1516651637760. Its totient is φ = 95169282048.

The previous prime is 391355228093. The next prime is 391355228167. The reversal of 391355228160 is 61822553193.

391355228160 is a `hidden beast` number, since 3 + 9 + 13 + 552 + 2 + 81 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391355228167) 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, 2343444397 + ... + 2343444563.

It is an arithmetic number, because the mean of its divisors is an integer number (1692691560).

Almost surely, 2^391355228160 is an apocalyptic number.

391355228160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391355228160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758325818880).

391355228160 is an abundant number, since it is smaller than the sum of its proper divisors (1125296409600).

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

391355228160 is a wasteful number, since it uses less digits than its factorization.

391355228160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 391355228160 in words is "three hundred ninety-one billion, three hundred fifty-five million, two hundred twenty-eight thousand, one hundred sixty".