163540426402651 has 4 divisors (see below), whose sum is σ = 163540515353400. Its totient is φ = 163540337451904.

The previous prime is 163540426402609. The next prime is 163540426402667. The reversal of 163540426402651 is 156204624045361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163540426402651 - 2¹⁵ = 163540426369883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163540426402595 and 163540426402604.

It is not an unprimeable number, because it can be changed into a prime (163540426402351) 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, 41658061 + ... + 45414478.

It is an arithmetic number, because the mean of its divisors is an integer number (40885128838350).

Almost surely, 2^{163540426402651} is an apocalyptic number.

163540426402651 is a deficient number, since it is larger than the sum of its proper divisors (88950749).

163540426402651 is an equidigital number, since it uses as much as digits as its factorization.

163540426402651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88950748.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 163540426402651 in words is "one hundred sixty-three trillion, five hundred forty billion, four hundred twenty-six million, four hundred two thousand, six hundred fifty-one".