81203511223626 has 32 divisors (see below), whose sum is σ = 177550679075328. Its totient is φ = 24554432688240.

The previous prime is 81203511223607. The next prime is 81203511223693. The reversal of 81203511223626 is 62632211530218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317267070 + ... + 1317328713.

It is an arithmetic number, because the mean of its divisors is an integer number (5548458721104).

Almost surely, 2^{81203511223626} is an apocalyptic number.

81203511223626 is an abundant number, since it is smaller than the sum of its proper divisors (96347167851702).

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

81203511223626 is a wasteful number, since it uses less digits than its factorization.

81203511223626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634596266.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 81203511223626 in words is "eighty-one trillion, two hundred three billion, five hundred eleven million, two hundred twenty-three thousand, six hundred twenty-six".