648099291101 has 4 divisors (see below), whose sum is σ = 648102475392. Its totient is φ = 648096106812.

The previous prime is 648099291079. The next prime is 648099291131. The reversal of 648099291101 is 101192990846.

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 a cyclic number.

It is not a de Polignac number, because 648099291101 - 2³⁴ = 630919421917 is a prime.

It is a super-2 number, since 2×648099291101² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648099291101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648099291131) 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, 1264355 + ... + 1701408.

It is an arithmetic number, because the mean of its divisors is an integer number (162025618848).

Almost surely, 2^648099291101 is an apocalyptic number.

It is an amenable number.

648099291101 is a deficient number, since it is larger than the sum of its proper divisors (3184291).

648099291101 is a wasteful number, since it uses less digits than its factorization.

648099291101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184290.

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 648099291101 in words is "six hundred forty-eight billion, ninety-nine million, two hundred ninety-one thousand, one hundred one".