81946625062 has 4 divisors (see below), whose sum is σ = 122919937596. Its totient is φ = 40973312530.

The previous prime is 81946625051. The next prime is 81946625071. The reversal of 81946625062 is 26052664918.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 81946624997 and 81946625015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20486656264 + ... + 20486656267.

It is an arithmetic number, because the mean of its divisors is an integer number (30729984399).

Almost surely, 2^81946625062 is an apocalyptic number.

81946625062 is a deficient number, since it is larger than the sum of its proper divisors (40973312534).

81946625062 is a wasteful number, since it uses less digits than its factorization.

81946625062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40973312533.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 81946625062 in words is "eighty-one billion, nine hundred forty-six million, six hundred twenty-five thousand, sixty-two".