81333340501154 has 32 divisors (see below), whose sum is σ = 139840112966400. Its totient is φ = 34754409665280.

The previous prime is 81333340501117. The next prime is 81333340501157. The reversal of 81333340501154 is 45110504333318.

It is a super-2 number, since 2×81333340501154² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81333340501157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598814 + ... + 12768134.

It is an arithmetic number, because the mean of its divisors is an integer number (4370003530200).

Almost surely, 2^{81333340501154} is an apocalyptic number.

81333340501154 is a deficient number, since it is larger than the sum of its proper divisors (58506772465246).

81333340501154 is a wasteful number, since it uses less digits than its factorization.

81333340501154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170738.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 81333340501154 in words is "eighty-one trillion, three hundred thirty-three billion, three hundred forty million, five hundred one thousand, one hundred fifty-four".