18641440970961 has 16 divisors (see below), whose sum is σ = 26558771817600. Its totient is φ = 11589282240768.

The previous prime is 18641440970941. The next prime is 18641440971001. The reversal of 18641440970961 is 16907904414681.

It is not a de Polignac number, because 18641440970961 - 2⁷ = 18641440970833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18641440970895 and 18641440970904.

It is not an unprimeable number, because it can be changed into a prime (18641440970941) 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, 1676684581 + ... + 1676695698.

It is an arithmetic number, because the mean of its divisors is an integer number (1659923238600).

Almost surely, 2^{18641440970961} is an apocalyptic number.

It is an amenable number.

18641440970961 is a deficient number, since it is larger than the sum of its proper divisors (7917330846639).

18641440970961 is a wasteful number, since it uses less digits than its factorization.

18641440970961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353380408.

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 18641440970961 in words is "eighteen trillion, six hundred forty-one billion, four hundred forty million, nine hundred seventy thousand, nine hundred sixty-one".