12635296240 has 80 divisors (see below), whose sum is σ = 35548742592. Its totient is φ = 4077268992.

The previous prime is 12635296199. The next prime is 12635296279. The reversal of 12635296240 is 4269253621.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12635296240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 12635296193 and 12635296202.

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, 654099 + ... + 673138.

Almost surely, 2^12635296240 is an apocalyptic number.

12635296240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12635296240 is an abundant number, since it is smaller than the sum of its proper divisors (22913446352).

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

12635296240 is a wasteful number, since it uses less digits than its factorization.

12635296240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327274 (or 1327268 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

It can be divided in two parts, 12635 and 296240, that multiplied together give a square (3742992400 = 61180²).

The spelling of 12635296240 in words is "twelve billion, six hundred thirty-five million, two hundred ninety-six thousand, two hundred forty".