81190472301 has 12 divisors (see below), whose sum is σ = 117300187680. Its totient is φ = 54115414920.

The previous prime is 81190472287. The next prime is 81190472347. The reversal of 81190472301 is 10327409118.

It is a happy number.

It is not a de Polignac number, because 81190472301 - 2¹³ = 81190464109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81190472201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919321 + ... + 1003758.

It is an arithmetic number, because the mean of its divisors is an integer number (9775015640).

Almost surely, 2^81190472301 is an apocalyptic number.

It is an amenable number.

81190472301 is a deficient number, since it is larger than the sum of its proper divisors (36109715379).

81190472301 is a wasteful number, since it uses less digits than its factorization.

81190472301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927776 (or 1927773 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 81190472301 in words is "eighty-one billion, one hundred ninety million, four hundred seventy-two thousand, three hundred one".