81153484810 has 16 divisors (see below), whose sum is σ = 146093754600. Its totient is φ = 32457509056.

The previous prime is 81153484793. The next prime is 81153484861. The reversal of 81153484810 is 1848435118.

It can be written as a sum of positive squares in 4 ways, for example, as 52403908561 + 28749576249 = 228919^2 + 169557^2 .

It is a super-2 number, since 2×81153484810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397105 + ... + 565684.

Almost surely, 2^81153484810 is an apocalyptic number.

81153484810 is a deficient number, since it is larger than the sum of its proper divisors (64940269790).

81153484810 is a wasteful number, since it uses less digits than its factorization.

81153484810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971225.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 81153484810 in words is "eighty-one billion, one hundred fifty-three million, four hundred eighty-four thousand, eight hundred ten".