81046476400 has 60 divisors (see below), whose sum is σ = 198388063512. Its totient is φ = 31806910720.

The previous prime is 81046476397. The next prime is 81046476451. The reversal of 81046476400 is 467464018.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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, 1890274 + ... + 1932673.

Almost surely, 2^81046476400 is an apocalyptic number.

81046476400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81046476400 is an abundant number, since it is smaller than the sum of its proper divisors (117341587112).

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

81046476400 is a wasteful number, since it uses less digits than its factorization.

81046476400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823018 (or 3823007 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 81046476400 in words is "eighty-one billion, forty-six million, four hundred seventy-six thousand, four hundred".