231546407940 has 36 divisors (see below), whose sum is σ = 702357437964. Its totient is φ = 61745708736.

The previous prime is 231546407927. The next prime is 231546407971. The reversal of 231546407940 is 49704645132.

231546407940 is a `hidden beast` number, since 2 + 3 + 154 + 6 + 407 + 94 + 0 = 666.

231546407940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 120653411904 + 110892996036 = 347352^2 + 333006^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×231546407940² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643184287 + ... + 643184646.

Almost surely, 2^231546407940 is an apocalyptic number.

231546407940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231546407940 is an abundant number, since it is smaller than the sum of its proper divisors (470811030024).

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

231546407940 is a wasteful number, since it uses less digits than its factorization.

231546407940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286368948 (or 1286368943 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 231546407940 in words is "two hundred thirty-one billion, five hundred forty-six million, four hundred seven thousand, nine hundred forty".