6997040521542 has 128 divisors (see below), whose sum is σ = 16271164293120. Its totient is φ = 2226609211680.

The previous prime is 6997040521501. The next prime is 6997040521543. The reversal of 6997040521542 is 2451250407996.

It is a happy number.

6997040521542 is a `hidden beast` number, since 6 + 9 + 9 + 7 + 0 + 40 + 52 + 1 + 542 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997040521543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81043417 + ... + 81129707.

It is an arithmetic number, because the mean of its divisors is an integer number (127118471040).

Almost surely, 2^{6997040521542} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6997040521542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8135582146560).

6997040521542 is an abundant number, since it is smaller than the sum of its proper divisors (9274123771578).

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

6997040521542 is a wasteful number, since it uses less digits than its factorization.

6997040521542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87135 (or 87129 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 6997040521542 in words is "six trillion, nine hundred ninety-seven billion, forty million, five hundred twenty-one thousand, five hundred forty-two".