12635030040 has 128 divisors (see below), whose sum is σ = 38745734400. Its totient is φ = 3295249920.

The previous prime is 12635030027. The next prime is 12635030053. The reversal of 12635030040 is 4003053621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12635030027) and next prime (12635030053).

It is a super-2 number, since 2×12635030040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1305459 + ... + 1315101.

It is an arithmetic number, because the mean of its divisors is an integer number (302701050).

Almost surely, 2^12635030040 is an apocalyptic number.

12635030040 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 12635030040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19372867200).

12635030040 is an abundant number, since it is smaller than the sum of its proper divisors (26110704360).

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

12635030040 is a wasteful number, since it uses less digits than its factorization.

12635030040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897 (or 9893 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 12635030040 its reverse (4003053621), we get a palindrome (16638083661).

The spelling of 12635030040 in words is "twelve billion, six hundred thirty-five million, thirty thousand, forty".