1398822656961 has 4 divisors (see below), whose sum is σ = 1865096875952. Its totient is φ = 932548437972.

The previous prime is 1398822656941. The next prime is 1398822656971. The reversal of 1398822656961 is 1696562288931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1398822656961 - 2⁵ = 1398822656929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1398822656892 and 1398822656901.

It is not an unprimeable number, because it can be changed into a prime (1398822656941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233137109491 + ... + 233137109496.

It is an arithmetic number, because the mean of its divisors is an integer number (466274218988).

Almost surely, 2^{1398822656961} is an apocalyptic number.

It is an amenable number.

1398822656961 is a deficient number, since it is larger than the sum of its proper divisors (466274218991).

1398822656961 is an equidigital number, since it uses as much as digits as its factorization.

1398822656961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466274218990.

The product of its digits is 67184640, while the sum is 66.

The spelling of 1398822656961 in words is "one trillion, three hundred ninety-eight billion, eight hundred twenty-two million, six hundred fifty-six thousand, nine hundred sixty-one".