947118218040 has 256 divisors, whose sum is σ = 3176960140800. Its totient is φ = 250975936512.

The previous prime is 947118218029. The next prime is 947118218051. The reversal of 947118218040 is 40812811749.

It is an interprime number because it is at equal distance from previous prime (947118218029) and next prime (947118218051).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 242413767 + ... + 242417673.

It is an arithmetic number, because the mean of its divisors is an integer number (12410000550).

Almost surely, 2^947118218040 is an apocalyptic number.

947118218040 is a gapful number since it is divisible by the number (90) 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 947118218040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588480070400).

947118218040 is an abundant number, since it is smaller than the sum of its proper divisors (2229841922760).

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

947118218040 is a wasteful number, since it uses less digits than its factorization.

947118218040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5283 (or 5273 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 947118218040 in words is "nine hundred forty-seven billion, one hundred eighteen million, two hundred eighteen thousand, forty".