9774695855401 has 3 divisors (see below), whose sum is σ = 9774698981853. Its totient is φ = 9774692728950.

The previous prime is 9774695855377. The next prime is 9774695855413. The reversal of 9774695855401 is 1045585964779.

The square root of 9774695855401 is 3126451.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9774695855401 - 2¹³ = 9774695847209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9774695855471) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1563226 + ... + 4689676.

It is an arithmetic number, because the mean of its divisors is an integer number (3258232993951).

Almost surely, 2^{9774695855401} is an apocalyptic number.

9774695855401 is the 3126451-st square number.

9774695855401 is the 1563226-th centered octagonal number.

It is an amenable number.

9774695855401 is a deficient number, since it is larger than the sum of its proper divisors (3126452).

9774695855401 is an frugal number, since it uses more digits than its factorization.

9774695855401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6252902 (or 3126451 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 70.

The spelling of 9774695855401 in words is "nine trillion, seven hundred seventy-four billion, six hundred ninety-five million, eight hundred fifty-five thousand, four hundred one".