81375030350 has 24 divisors (see below), whose sum is σ = 152036310720. Its totient is φ = 32404043520.

The previous prime is 81375030337. The next prime is 81375030353. The reversal of 81375030350 is 5303057318.

It is a super-2 number, since 2×81375030350² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81375030350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81375030353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3637955 + ... + 3660254.

It is an arithmetic number, because the mean of its divisors is an integer number (6334846280).

Almost surely, 2^81375030350 is an apocalyptic number.

81375030350 is a deficient number, since it is larger than the sum of its proper divisors (70661280370).

81375030350 is a wasteful number, since it uses less digits than its factorization.

81375030350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7298444 (or 7298439 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

Adding to 81375030350 its reverse (5303057318), we get a palindrome (86678087668).

The spelling of 81375030350 in words is "eighty-one billion, three hundred seventy-five million, thirty thousand, three hundred fifty".