81148072413 has 8 divisors (see below), whose sum is σ = 108328900288. Its totient is φ = 54032979744.

The previous prime is 81148072393. The next prime is 81148072427. The reversal of 81148072413 is 31427084118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81148072413 - 2⁶ = 81148072349 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 (81148072013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16430920 + ... + 16435857.

It is an arithmetic number, because the mean of its divisors is an integer number (13541112536).

Almost surely, 2^81148072413 is an apocalyptic number.

It is an amenable number.

81148072413 is a deficient number, since it is larger than the sum of its proper divisors (27180827875).

81148072413 is a wasteful number, since it uses less digits than its factorization.

81148072413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32867603.

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 81148072413 in words is "eighty-one billion, one hundred forty-eight million, seventy-two thousand, four hundred thirteen".