11821500007975 has 24 divisors (see below), whose sum is σ = 16753105732608. Its totient is φ = 8106001384800.

The previous prime is 11821500007957. The next prime is 11821500007979. The reversal of 11821500007975 is 57970000512811.

It is not a de Polignac number, because 11821500007975 - 2⁷ = 11821500007847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821500007979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7959582 + ... + 9327268.

It is an arithmetic number, because the mean of its divisors is an integer number (698046072192).

Almost surely, 2^{11821500007975} is an apocalyptic number.

11821500007975 is a deficient number, since it is larger than the sum of its proper divisors (4931605724633).

11821500007975 is a wasteful number, since it uses less digits than its factorization.

11821500007975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417095 (or 1417090 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 46.

The spelling of 11821500007975 in words is "eleven trillion, eight hundred twenty-one billion, five hundred million, seven thousand, nine hundred seventy-five".