81070154 has 8 divisors (see below), whose sum is σ = 132660288. Its totient is φ = 36850060.

The previous prime is 81070153. The next prime is 81070163. The reversal of 81070154 is 45107018.

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

It is not an unprimeable number, because it can be changed into a prime (81070153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1842482 + ... + 1842525.

It is an arithmetic number, because the mean of its divisors is an integer number (16582536).

Almost surely, 2^81070154 is an apocalyptic number.

81070154 is a deficient number, since it is larger than the sum of its proper divisors (51590134).

81070154 is a wasteful number, since it uses less digits than its factorization.

81070154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685020.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 81070154 is about 9003.8966009167. The cubic root of 81070154 is about 432.7997481044.

The spelling of 81070154 in words is "eighty-one million, seventy thousand, one hundred fifty-four".