42991206720 has 896 divisors, whose sum is σ = 178767101952. Its totient is φ = 8493465600.

The previous prime is 42991206701. The next prime is 42991206733. The reversal of 42991206720 is 2760219924.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 167280832 + ... + 167281088.

Almost surely, 2^42991206720 is an apocalyptic number.

42991206720 is a gapful number since it is divisible by the number (40) 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 42991206720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89383550976).

42991206720 is an abundant number, since it is smaller than the sum of its proper divisors (135775895232).

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

42991206720 is a wasteful number, since it uses less digits than its factorization.

42991206720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 42991206720 in words is "forty-two billion, nine hundred ninety-one million, two hundred six thousand, seven hundred twenty".