78147113307550 has 48 divisors (see below), whose sum is σ = 166132475412480. Its totient is φ = 26791031432160.

The previous prime is 78147113307517. The next prime is 78147113307559. The reversal of 78147113307550 is 5570331174187.

It is a super-2 number, since 2×78147113307550² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78147113307559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5286094 + ... + 13573393.

It is an arithmetic number, because the mean of its divisors is an integer number (3461093237760).

Almost surely, 2^{78147113307550} is an apocalyptic number.

78147113307550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78147113307550 is an abundant number, since it is smaller than the sum of its proper divisors (87985362104930).

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

78147113307550 is a wasteful number, since it uses less digits than its factorization.

78147113307550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871345 (or 18871340 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 78147113307550 in words is "seventy-eight trillion, one hundred forty-seven billion, one hundred thirteen million, three hundred seven thousand, five hundred fifty".