1011902201856 has 1680 divisors, whose sum is σ = 4011205072000. Its totient is φ = 252829237248.

The previous prime is 1011902201803. The next prime is 1011902201867. The reversal of 1011902201856 is 6581022091101.

It is a super-2 number, since 2×1011902201856² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1011902201856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 53258010615 + ... + 53258010633.

Almost surely, 2^{1011902201856} is an apocalyptic number.

1011902201856 is a gapful number since it is divisible by the number (16) 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 1011902201856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005602536000).

1011902201856 is an abundant number, since it is smaller than the sum of its proper divisors (2999302870144).

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

1011902201856 is an frugal number, since it uses more digits than its factorization.

1011902201856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

Adding to 1011902201856 its reverse (6581022091101), we get a palindrome (7592924292957).

The spelling of 1011902201856 in words is "one trillion, eleven billion, nine hundred two million, two hundred one thousand, eight hundred fifty-six".