86137223321621 has 4 divisors (see below), whose sum is σ = 90670761391200. Its totient is φ = 81603685252044.

The previous prime is 86137223321599. The next prime is 86137223321641. The reversal of 86137223321621 is 12612332273168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86137223321621 - 2²² = 86137219127317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86137223321641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2266769034761 + ... + 2266769034798.

It is an arithmetic number, because the mean of its divisors is an integer number (22667690347800).

Almost surely, 2^{86137223321621} is an apocalyptic number.

It is an amenable number.

86137223321621 is a deficient number, since it is larger than the sum of its proper divisors (4533538069579).

86137223321621 is a wasteful number, since it uses less digits than its factorization.

86137223321621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533538069578.

The product of its digits is 870912, while the sum is 47.

Adding to 86137223321621 its reverse (12612332273168), we get a palindrome (98749555594789).

The spelling of 86137223321621 in words is "eighty-six trillion, one hundred thirty-seven billion, two hundred twenty-three million, three hundred twenty-one thousand, six hundred twenty-one".