9977155188 has 576 divisors, whose sum is σ = 34034380800. Its totient is φ = 2253968640.

The previous prime is 9977155171. The next prime is 9977155193. The reversal of 9977155188 is 8815517799.

It is a happy number.

Its product of digits (6350400) is a multiple of the sum of its prime divisors (126).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 148912731 + ... + 148912797.

Almost surely, 2^9977155188 is an apocalyptic number.

9977155188 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9977155188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17017190400).

9977155188 is an abundant number, since it is smaller than the sum of its proper divisors (24057225612).

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

9977155188 is a wasteful number, since it uses less digits than its factorization.

9977155188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 126 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 60.

The square root of 9977155188 is about 99885.7106296992. The cubic root of 9977155188 is about 2152.7928506307.

The spelling of 9977155188 in words is "nine billion, nine hundred seventy-seven million, one hundred fifty-five thousand, one hundred eighty-eight".