9920648949 has 8 divisors (see below), whose sum is σ = 13802642112. Its totient is φ = 6326210880.

The previous prime is 9920648921. The next prime is 9920648971. The reversal of 9920648949 is 9498460299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9920648949 - 2⁷ = 9920648821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9920648892 and 9920648901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920648989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71888692 + ... + 71888829.

It is an arithmetic number, because the mean of its divisors is an integer number (1725330264).

Almost surely, 2^9920648949 is an apocalyptic number.

It is an amenable number.

9920648949 is a deficient number, since it is larger than the sum of its proper divisors (3881993163).

9920648949 is a wasteful number, since it uses less digits than its factorization.

9920648949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143777547.

The product of its (nonzero) digits is 10077696, while the sum is 60.

The square root of 9920648949 is about 99602.4545330084. The cubic root of 9920648949 is about 2148.7209951208.

The spelling of 9920648949 in words is "nine billion, nine hundred twenty million, six hundred forty-eight thousand, nine hundred forty-nine".