545641651091 has 2 divisors, whose sum is σ = 545641651092. Its totient is φ = 545641651090.

The previous prime is 545641651069. The next prime is 545641651153. The reversal of 545641651091 is 190156146545.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545641651091 - 2²² = 545637456787 is a prime.

It is a super-2 number, since 2×545641651091² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (545641651021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272820825545 + 272820825546.

It is an arithmetic number, because the mean of its divisors is an integer number (272820825546).

Almost surely, 2^545641651091 is an apocalyptic number.

545641651091 is a deficient number, since it is larger than the sum of its proper divisors (1).

545641651091 is an equidigital number, since it uses as much as digits as its factorization.

545641651091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 545641651091 in words is "five hundred forty-five billion, six hundred forty-one million, six hundred fifty-one thousand, ninety-one".