16231154940 has 864 divisors, whose sum is σ = 71337599424. Its totient is φ = 2926264320.

The previous prime is 16231154921. The next prime is 16231154963. The reversal of 16231154940 is 4945113261.

It is a happy number.

16231154940 is a `hidden beast` number, since 1 + 62 + 3 + 11 + 549 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16231154895 and 16231154904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 21441042 + ... + 21441798.

It is an arithmetic number, because the mean of its divisors is an integer number (82566666).

Almost surely, 2^16231154940 is an apocalyptic number.

16231154940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16231154940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35668799712).

16231154940 is an abundant number, since it is smaller than the sum of its proper divisors (55106444484).

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

16231154940 is a wasteful number, since it uses less digits than its factorization.

16231154940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

It can be divided in two parts, 16231 and 154940, that added together give a palindrome (171171).

The spelling of 16231154940 in words is "sixteen billion, two hundred thirty-one million, one hundred fifty-four thousand, nine hundred forty".