105971523840 has 864 divisors, whose sum is σ = 460694707200. Its totient is φ = 22347988992.

The previous prime is 105971523809. The next prime is 105971523851. The reversal of 105971523840 is 48325179501.

105971523840 is a `hidden beast` number, since 1 + 0 + 59 + 71 + 523 + 8 + 4 + 0 = 666.

It is a super-2 number, since 2×105971523840² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51366649 + ... + 51368711.

Almost surely, 2^105971523840 is an apocalyptic number.

105971523840 is a gapful number since it is divisible by the number (10) 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 105971523840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230347353600).

105971523840 is an abundant number, since it is smaller than the sum of its proper divisors (354723183360).

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

105971523840 is a wasteful number, since it uses less digits than its factorization.

105971523840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 105971523840 in words is "one hundred five billion, nine hundred seventy-one million, five hundred twenty-three thousand, eight hundred forty".