9772373556 has 72 divisors (see below), whose sum is σ = 27113565024. Its totient is φ = 2943138240.

The previous prime is 9772373537. The next prime is 9772373557. The reversal of 9772373556 is 6553732779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9772373557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11151 + ... + 140246.

It is an arithmetic number, because the mean of its divisors is an integer number (376577292).

Almost surely, 2^9772373556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9772373556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13556782512).

9772373556 is an abundant number, since it is smaller than the sum of its proper divisors (17341191468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9772373556 is a wasteful number, since it uses less digits than its factorization.

9772373556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151581 (or 151576 counting only the distinct ones).

The product of its digits is 8334900, while the sum is 54.

The square root of 9772373556 is about 98855.3162758584. The cubic root of 9772373556 is about 2137.9621876920.

The spelling of 9772373556 in words is "nine billion, seven hundred seventy-two million, three hundred seventy-three thousand, five hundred fifty-six".