81124681470 has 32 divisors (see below), whose sum is σ = 222513412608. Its totient is φ = 18542784288.

The previous prime is 81124681453. The next prime is 81124681559. The reversal of 81124681470 is 7418642118.

It is a super-2 number, since 2×81124681470² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193153794 + ... + 193154213.

It is an arithmetic number, because the mean of its divisors is an integer number (6953544144).

Almost surely, 2^81124681470 is an apocalyptic number.

81124681470 is an abundant number, since it is smaller than the sum of its proper divisors (141388731138).

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

81124681470 is a wasteful number, since it uses less digits than its factorization.

81124681470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386308024.

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 81124681470 in words is "eighty-one billion, one hundred twenty-four million, six hundred eighty-one thousand, four hundred seventy".