1863913863900 has 144 divisors (see below), whose sum is σ = 5883782163840. Its totient is φ = 451812422400.

The previous prime is 1863913863893. The next prime is 1863913863907. The reversal of 1863913863900 is 93683193681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1863913863893) and next prime (1863913863907).

It is a super-3 number, since 3×1863913863900³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863913863907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42313687 + ... + 42357713.

It is an arithmetic number, because the mean of its divisors is an integer number (40859598360).

Almost surely, 2^{1863913863900} is an apocalyptic number.

1863913863900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1863913863900 is an abundant number, since it is smaller than the sum of its proper divisors (4019868299940).

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

1863913863900 is a wasteful number, since it uses less digits than its factorization.

1863913863900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56884 (or 56877 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 1863913863900 in words is "one trillion, eight hundred sixty-three billion, nine hundred thirteen million, eight hundred sixty-three thousand, nine hundred".