9974637157805 has 6 divisors (see below), whose sum is σ = 11969573063886. Its totient is φ = 7979704076568.

The previous prime is 9974637157799. The next prime is 9974637157831. The reversal of 9974637157805 is 5087517364799.

9974637157805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7979709726244 + 1994927431561 = 2824838^2 + 1412419^2 .

It is not a de Polignac number, because 9974637157805 - 2¹² = 9974637153709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6355886 + ... + 7768304.

It is an arithmetic number, because the mean of its divisors is an integer number (1994928843981).

Almost surely, 2^{9974637157805} is an apocalyptic number.

It is an amenable number.

9974637157805 is a deficient number, since it is larger than the sum of its proper divisors (1994935906081).

9974637157805 is an frugal number, since it uses more digits than its factorization.

9974637157805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824843 (or 1412424 counting only the distinct ones).

The product of its (nonzero) digits is 400075200, while the sum is 71.

The spelling of 9974637157805 in words is "nine trillion, nine hundred seventy-four billion, six hundred thirty-seven million, one hundred fifty-seven thousand, eight hundred five".