70871816400 has 1440 divisors, whose sum is σ = 311308646400. Its totient is φ = 13586227200.

The previous prime is 70871816371. The next prime is 70871816401. The reversal of 70871816400 is 461817807.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70871816401) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 897111561 + ... + 897111639.

It is an arithmetic number, because the mean of its divisors is an integer number (216186560).

Almost surely, 2^70871816400 is an apocalyptic number.

70871816400 is a gapful number since it is divisible by the number (70) 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 70871816400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155654323200).

70871816400 is an abundant number, since it is smaller than the sum of its proper divisors (240436830000).

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

70871816400 is a wasteful number, since it uses less digits than its factorization.

70871816400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 70871816400 in words is "seventy billion, eight hundred seventy-one million, eight hundred sixteen thousand, four hundred".