637097878872 has 960 divisors, whose sum is σ = 2385778237920. Its totient is φ = 156889571328.

The previous prime is 637097878841. The next prime is 637097878873. The reversal of 637097878872 is 278878790736.

637097878872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 637097878872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637097878873) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1143802018 + ... + 1143802574.

Almost surely, 2^637097878872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 637097878872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192889118960).

637097878872 is an abundant number, since it is smaller than the sum of its proper divisors (1748680359048).

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

637097878872 is a wasteful number, since it uses less digits than its factorization.

637097878872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 398297088, while the sum is 72.

The spelling of 637097878872 in words is "six hundred thirty-seven billion, ninety-seven million, eight hundred seventy-eight thousand, eight hundred seventy-two".