1866357440124 has 48 divisors (see below), whose sum is σ = 4662809776800. Its totient is φ = 578944976896.

The previous prime is 1866357440113. The next prime is 1866357440153. The reversal of 1866357440124 is 4210447536681.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51379659 + ... + 51415970.

It is an arithmetic number, because the mean of its divisors is an integer number (97141870350).

Almost surely, 2^{1866357440124} is an apocalyptic number.

It is an amenable number.

1866357440124 is an abundant number, since it is smaller than the sum of its proper divisors (2796452336676).

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

1866357440124 is a wasteful number, since it uses less digits than its factorization.

1866357440124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102795742 (or 102795740 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 1866357440124 in words is "one trillion, eight hundred sixty-six billion, three hundred fifty-seven million, four hundred forty thousand, one hundred twenty-four".