20315456651161 has 16 divisors (see below), whose sum is σ = 24762850695936. Its totient is φ = 16269312508416.

The previous prime is 20315456651131. The next prime is 20315456651167. The reversal of 20315456651161 is 16115665451302.

It is not a de Polignac number, because 20315456651161 - 2¹³ = 20315456642969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315456651167) 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, 623042541 + ... + 623075146.

It is an arithmetic number, because the mean of its divisors is an integer number (1547678168496).

Almost surely, 2^{20315456651161} is an apocalyptic number.

It is an amenable number.

20315456651161 is a deficient number, since it is larger than the sum of its proper divisors (4447394044775).

20315456651161 is a wasteful number, since it uses less digits than its factorization.

20315456651161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246117848.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 20315456651161 in words is "twenty trillion, three hundred fifteen billion, four hundred fifty-six million, six hundred fifty-one thousand, one hundred sixty-one".