12547117770 has 64 divisors (see below), whose sum is σ = 33034314240. Its totient is φ = 3024718400.

The previous prime is 12547117769. The next prime is 12547117771. The reversal of 12547117770 is 7771174521.

It is an interprime number because it is at equal distance from previous prime (12547117769) and next prime (12547117771).

It is not an unprimeable number, because it can be changed into a prime (12547117771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47136 + ... + 165275.

It is an arithmetic number, because the mean of its divisors is an integer number (516161160).

Almost surely, 2^12547117770 is an apocalyptic number.

12547117770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12547117770 is an abundant number, since it is smaller than the sum of its proper divisors (20487196470).

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

12547117770 is a wasteful number, since it uses less digits than its factorization.

12547117770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212611.

The product of its (nonzero) digits is 96040, while the sum is 42.

The spelling of 12547117770 in words is "twelve billion, five hundred forty-seven million, one hundred seventeen thousand, seven hundred seventy".