84421891156 has 12 divisors (see below), whose sum is σ = 151341683220. Its totient is φ = 41181410240.

The previous prime is 84421891153. The next prime is 84421891157. The reversal of 84421891156 is 65119812448.

It can be written as a sum of positive squares in 2 ways, for example, as 50026479556 + 34395411600 = 223666^2 + 185460^2 .

It is a super-2 number, since 2×84421891156² (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 (84421891153) 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, 257383651 + ... + 257383978.

It is an arithmetic number, because the mean of its divisors is an integer number (12611806935).

Almost surely, 2^84421891156 is an apocalyptic number.

It is an amenable number.

84421891156 is a deficient number, since it is larger than the sum of its proper divisors (66919792064).

84421891156 is a wasteful number, since it uses less digits than its factorization.

84421891156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514767674 (or 514767672 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 84421891156 in words is "eighty-four billion, four hundred twenty-one million, eight hundred ninety-one thousand, one hundred fifty-six".