81201438962 has 16 divisors (see below), whose sum is σ = 139256212992. Its totient is φ = 34787180160.

The previous prime is 81201438947. The next prime is 81201439057. The reversal of 81201438962 is 26983410218.

It is a happy number.

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, 1082114 + ... + 1154717.

It is an arithmetic number, because the mean of its divisors is an integer number (8703513312).

Almost surely, 2^81201438962 is an apocalyptic number.

81201438962 is a deficient number, since it is larger than the sum of its proper divisors (58054774030).

81201438962 is a wasteful number, since it uses less digits than its factorization.

81201438962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239433.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 81201438962 in words is "eighty-one billion, two hundred one million, four hundred thirty-eight thousand, nine hundred sixty-two".