1864636047340 has 96 divisors (see below), whose sum is σ = 4335795330048. Its totient is φ = 667894752000.

The previous prime is 1864636047317. The next prime is 1864636047353. The reversal of 1864636047340 is 437406364681.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17394105 + ... + 17500975.

It is an arithmetic number, because the mean of its divisors is an integer number (45164534688).

Almost surely, 2^{1864636047340} is an apocalyptic number.

1864636047340 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 1864636047340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2167897665024).

1864636047340 is an abundant number, since it is smaller than the sum of its proper divisors (2471159282708).

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

1864636047340 is a wasteful number, since it uses less digits than its factorization.

1864636047340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108079 (or 108077 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 52.

The spelling of 1864636047340 in words is "one trillion, eight hundred sixty-four billion, six hundred thirty-six million, forty-seven thousand, three hundred forty".