1247131003680 has 72 divisors (see below), whose sum is σ = 4255834554972. Its totient is φ = 332568267264.

The previous prime is 1247131003631. The next prime is 1247131003681. The reversal of 1247131003680 is 863001317421.

It is a happy number.

1247131003680 is a `hidden beast` number, since 1 + 2 + 471 + 3 + 100 + 3 + 6 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1110553453584 + 136577550096 = 1053828^2 + 369564^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (1247131003681) by changing a digit.

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, 433030159 + ... + 433033038.

Almost surely, 2^{1247131003680} is an apocalyptic number.

1247131003680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247131003680 is an abundant number, since it is smaller than the sum of its proper divisors (3008703551292).

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

1247131003680 is a wasteful number, since it uses less digits than its factorization.

1247131003680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866063218 (or 866063207 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 1247131003680 in words is "one trillion, two hundred forty-seven billion, one hundred thirty-one million, three thousand, six hundred eighty".