12151153440 has 120 divisors (see below), whose sum is σ = 42883491420. Its totient is φ = 3240304128.

The previous prime is 12151153423. The next prime is 12151153447. The reversal of 12151153440 is 4435115121.

12151153440 is a `hidden beast` number, since 1 + 21 + 51 + 153 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11286087696 + 865065744 = 106236^2 + 29412^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12151153447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 455835 + ... + 481754.

Almost surely, 2^12151153440 is an apocalyptic number.

12151153440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12151153440 is an abundant number, since it is smaller than the sum of its proper divisors (30732337980).

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

12151153440 is an equidigital number, since it uses as much as digits as its factorization.

12151153440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937616 (or 937599 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12151153440 its reverse (4435115121), we get a palindrome (16586268561).

The spelling of 12151153440 in words is "twelve billion, one hundred fifty-one million, one hundred fifty-three thousand, four hundred forty".