81074743150 has 24 divisors (see below), whose sum is σ = 153271143144. Its totient is φ = 31898258400.

The previous prime is 81074743091. The next prime is 81074743223. The reversal of 81074743150 is 5134747018.

It is a happy number.

It is a super-2 number, since 2×81074743150² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13287892 + ... + 13293991.

It is an arithmetic number, because the mean of its divisors is an integer number (6386297631).

Almost surely, 2^81074743150 is an apocalyptic number.

81074743150 is a deficient number, since it is larger than the sum of its proper divisors (72196399994).

81074743150 is a wasteful number, since it uses less digits than its factorization.

81074743150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26581956 (or 26581951 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 81074743150 in words is "eighty-one billion, seventy-four million, seven hundred forty-three thousand, one hundred fifty".