81753480 has 48 divisors (see below), whose sum is σ = 265699980. Its totient is φ = 21800832.

The previous prime is 81753473. The next prime is 81753491. The reversal of 81753480 is 8435718.

81753480 is a `hidden beast` number, since 8 + 175 + 3 + 480 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 3218436 = 8862^2 + 1794^2 .

It is a super-2 number, since 2×81753480² = 13367262984220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 113187 + ... + 113906.

Almost surely, 2^81753480 is an apocalyptic number.

It is an amenable number.

81753480 is an abundant number, since it is smaller than the sum of its proper divisors (183946500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81753480 is a wasteful number, since it uses less digits than its factorization.

81753480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227110 (or 227103 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 81753480 is about 9041.7631024043. The cubic root of 81753480 is about 434.0123450657.

The spelling of 81753480 in words is "eighty-one million, seven hundred fifty-three thousand, four hundred eighty".