86212797550 has 48 divisors (see below), whose sum is σ = 177801436944. Its totient is φ = 30836160000.

The previous prime is 86212797491. The next prime is 86212797551. The reversal of 86212797550 is 5579721268.

It is a happy number.

It is a super-2 number, since 2×86212797550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86212797551) 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, 1251291 + ... + 1318390.

It is an arithmetic number, because the mean of its divisors is an integer number (3704196603).

Almost surely, 2^86212797550 is an apocalyptic number.

86212797550 is an abundant number, since it is smaller than the sum of its proper divisors (91588639394).

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

86212797550 is a wasteful number, since it uses less digits than its factorization.

86212797550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569765 (or 2569760 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 86212797550 in words is "eighty-six billion, two hundred twelve million, seven hundred ninety-seven thousand, five hundred fifty".