81029251151 has 8 divisors (see below), whose sum is σ = 85404305520. Its totient is φ = 76665232512.

The previous prime is 81029251133. The next prime is 81029251169. The reversal of 81029251151 is 15115292018.

It is an interprime number because it is at equal distance from previous prime (81029251133) and next prime (81029251169).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81029251151 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 (81029251951) 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, 2743850 + ... + 2773223.

It is an arithmetic number, because the mean of its divisors is an integer number (10675538190).

Almost surely, 2^81029251151 is an apocalyptic number.

81029251151 is a deficient number, since it is larger than the sum of its proper divisors (4375054369).

81029251151 is a wasteful number, since it uses less digits than its factorization.

81029251151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517865.

The product of its (nonzero) digits is 7200, while the sum is 35.

The spelling of 81029251151 in words is "eighty-one billion, twenty-nine million, two hundred fifty-one thousand, one hundred fifty-one".