87221681485911 has 96 divisors (see below), whose sum is σ = 148482891648000. Its totient is φ = 49312653163200.

The previous prime is 87221681485907. The next prime is 87221681485951. The reversal of 87221681485911 is 11958418612278.

87221681485911 is a `hidden beast` number, since 8 + 7 + 2 + 2 + 1 + 68 + 1 + 485 + 91 + 1 = 666.

It is not a de Polignac number, because 87221681485911 - 2² = 87221681485907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87221681485951) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 444822030 + ... + 445018068.

It is an arithmetic number, because the mean of its divisors is an integer number (1546696788000).

Almost surely, 2^{87221681485911} is an apocalyptic number.

87221681485911 is a deficient number, since it is larger than the sum of its proper divisors (61261210162089).

87221681485911 is a wasteful number, since it uses less digits than its factorization.

87221681485911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197594 (or 197577 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 63.

The spelling of 87221681485911 in words is "eighty-seven trillion, two hundred twenty-one billion, six hundred eighty-one million, four hundred eighty-five thousand, nine hundred eleven".