9561920377 has 4 divisors (see below), whose sum is σ = 9564184576. Its totient is φ = 9559656180.

The previous prime is 9561920359. The next prime is 9561920383. The reversal of 9561920377 is 7730291659.

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 9561920377 - 2²⁷ = 9427702649 is a prime.

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 9561920377.

It is not an unprimeable number, because it can be changed into a prime (9561920327) 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, 1125753 + ... + 1134214.

It is an arithmetic number, because the mean of its divisors is an integer number (2391046144).

Almost surely, 2^9561920377 is an apocalyptic number.

It is an amenable number.

9561920377 is a deficient number, since it is larger than the sum of its proper divisors (2264199).

9561920377 is a wasteful number, since it uses less digits than its factorization.

9561920377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264198.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 9561920377 is about 97785.0723628101. The cubic root of 9561920377 is about 2122.5033008689.

The spelling of 9561920377 in words is "nine billion, five hundred sixty-one million, nine hundred twenty thousand, three hundred seventy-seven".