4988831661 has 32 divisors (see below), whose sum is σ = 8259431040. Its totient is φ = 2949782400.

The previous prime is 4988831657. The next prime is 4988831681. The reversal of 4988831661 is 1661388894.

4988831661 is a `hidden beast` number, since 498 + 8 + 83 + 16 + 61 = 666.

It is not a de Polignac number, because 4988831661 - 2² = 4988831657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4988831598 and 4988831607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4988831651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192670 + ... + 217023.

It is an arithmetic number, because the mean of its divisors is an integer number (258107220).

Almost surely, 2^4988831661 is an apocalyptic number.

4988831661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4988831661 is a deficient number, since it is larger than the sum of its proper divisors (3270599379).

4988831661 is a wasteful number, since it uses less digits than its factorization.

4988831661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409754 (or 409748 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 4988831661 is about 70631.6618875699. The cubic root of 4988831661 is about 1708.7018248133.

The spelling of 4988831661 in words is "four billion, nine hundred eighty-eight million, eight hundred thirty-one thousand, six hundred sixty-one".