81623465462 has 16 divisors (see below), whose sum is σ = 152646481152. Its totient is φ = 31801350120.

The previous prime is 81623465393. The next prime is 81623465467. The reversal of 81623465462 is 26456432618.

It is a super-2 number, since 2×81623465462² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81623465467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265011098 + ... + 265011405.

It is an arithmetic number, because the mean of its divisors is an integer number (9540405072).

Almost surely, 2^81623465462 is an apocalyptic number.

81623465462 is a deficient number, since it is larger than the sum of its proper divisors (71023015690).

81623465462 is a wasteful number, since it uses less digits than its factorization.

81623465462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530022523.

The product of its digits is 1658880, while the sum is 47.

The spelling of 81623465462 in words is "eighty-one billion, six hundred twenty-three million, four hundred sixty-five thousand, four hundred sixty-two".