81484536787002 has 160 divisors (see below), whose sum is σ = 189642692219904. Its totient is φ = 26122630636800.

The previous prime is 81484536786953. The next prime is 81484536787019. The reversal of 81484536787002 is 20078763548418.

It is a happy number.

81484536787002 is a `hidden beast` number, since 8 + 1 + 48 + 453 + 6 + 78 + 70 + 0 + 2 = 666.

It is a super-2 number, since 2×81484536787002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7901142598 + ... + 7901152910.

Almost surely, 2^{81484536787002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81484536787002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94821346109952).

81484536787002 is an abundant number, since it is smaller than the sum of its proper divisors (108158155432902).

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

81484536787002 is a wasteful number, since it uses less digits than its factorization.

81484536787002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19946 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 63.

The spelling of 81484536787002 in words is "eighty-one trillion, four hundred eighty-four billion, five hundred thirty-six million, seven hundred eighty-seven thousand, two".