7021138475520 has 2400 divisors, whose sum is σ = 29435652854784. Its totient is φ = 1594117324800.

The previous prime is 7021138475509. The next prime is 7021138475521. The reversal of 7021138475520 is 255748311207.

7021138475520 is a `hidden beast` number, since 7 + 0 + 2 + 1 + 13 + 84 + 7 + 552 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (7021138475521) 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, 24986257780 + ... + 24986258060.

Almost surely, 2^{7021138475520} 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 7021138475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14717826427392).

7021138475520 is an abundant number, since it is smaller than the sum of its proper divisors (22414514379264).

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

7021138475520 is a wasteful number, since it uses less digits than its factorization.

7021138475520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 7021138475520 in words is "seven trillion, twenty-one billion, one hundred thirty-eight million, four hundred seventy-five thousand, five hundred twenty".