1865897604672 has 112 divisors (see below), whose sum is σ = 5364323942400. Its totient is φ = 570223342080.

The previous prime is 1865897604671. The next prime is 1865897604689. The reversal of 1865897604672 is 2764067985681.

It is a super-2 number, since 2×1865897604672² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1865897604597 and 1865897604606.

It is not an unprimeable number, because it can be changed into a prime (1865897604671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8136672 + ... + 8362847.

Almost surely, 2^{1865897604672} is an apocalyptic number.

1865897604672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1865897604672 is an abundant number, since it is smaller than the sum of its proper divisors (3498426337728).

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

1865897604672 is a wasteful number, since it uses less digits than its factorization.

1865897604672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16499584 (or 16499574 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 69.

The spelling of 1865897604672 in words is "one trillion, eight hundred sixty-five billion, eight hundred ninety-seven million, six hundred four thousand, six hundred seventy-two".