9977951748 has 12 divisors (see below), whose sum is σ = 23281887440. Its totient is φ = 3325983912.

The previous prime is 9977951677. The next prime is 9977951749. The reversal of 9977951748 is 8471597799.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (9977951749) 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, 415747978 + ... + 415748001.

Almost surely, 2^9977951748 is an apocalyptic number.

It is an amenable number.

9977951748 is an abundant number, since it is smaller than the sum of its proper divisors (13303935692).

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

9977951748 is a wasteful number, since it uses less digits than its factorization.

9977951748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831495986 (or 831495984 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 66.

The square root of 9977951748 is about 99889.6979072417. The cubic root of 9977951748 is about 2152.8501409440.

The spelling of 9977951748 in words is "nine billion, nine hundred seventy-seven million, nine hundred fifty-one thousand, seven hundred forty-eight".