6998730378997 has 16 divisors (see below), whose sum is σ = 8130266202240. Its totient is φ = 5900755090752.

The previous prime is 6998730378989. The next prime is 6998730379001. The reversal of 6998730378997 is 7998730378996.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6998730378997 - 2³ = 6998730378989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6998730378977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26168278 + ... + 26434375.

It is an arithmetic number, because the mean of its divisors is an integer number (508141637640).

Almost surely, 2^{6998730378997} is an apocalyptic number.

It is an amenable number.

6998730378997 is a deficient number, since it is larger than the sum of its proper divisors (1131535823243).

6998730378997 is a wasteful number, since it uses less digits than its factorization.

6998730378997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52602972.

The product of its (nonzero) digits is 7777461888, while the sum is 85.

Subtracting 6998730378997 from its reverse (7998730378996), we obtain a palindrome (999999999999).

The spelling of 6998730378997 in words is "six trillion, nine hundred ninety-eight billion, seven hundred thirty million, three hundred seventy-eight thousand, nine hundred ninety-seven".