2185861054972 has 24 divisors (see below), whose sum is σ = 4371943802240. Its totient is φ = 936750089520.

The previous prime is 2185861054961. The next prime is 2185861055017. The reversal of 2185861054972 is 2794501685812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414554 + ... + 2524417.

Almost surely, 2^{2185861054972} is an apocalyptic number.

It is an amenable number.

2185861054972 is an abundant number, since it is smaller than the sum of its proper divisors (2186082747268).

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

2185861054972 is a wasteful number, since it uses less digits than its factorization.

2185861054972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958801 (or 3958799 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 2185861054972 in words is "two trillion, one hundred eighty-five billion, eight hundred sixty-one million, fifty-four thousand, nine hundred seventy-two".