9977777652 has 24 divisors (see below), whose sum is σ = 23288328000. Its totient is φ = 3324947776.

The previous prime is 9977777651. The next prime is 9977777669. The reversal of 9977777652 is 2567777799.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977777651) 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, 79152 + ... + 161927.

It is an arithmetic number, because the mean of its divisors is an integer number (970347000).

Almost surely, 2^9977777652 is an apocalyptic number.

It is an amenable number.

9977777652 is an abundant number, since it is smaller than the sum of its proper divisors (13310550348).

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

9977777652 is a wasteful number, since it uses less digits than its factorization.

9977777652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244535 (or 244533 counting only the distinct ones).

The product of its digits is 81682020, while the sum is 66.

The square root of 9977777652 is about 99888.8264622225. The cubic root of 9977777652 is about 2152.8376198445.

The spelling of 9977777652 in words is "nine billion, nine hundred seventy-seven million, seven hundred seventy-seven thousand, six hundred fifty-two".