8821961541 has 24 divisors (see below), whose sum is σ = 13092825824. Its totient is φ = 5719908960.

The previous prime is 8821961537. The next prime is 8821961563. The reversal of 8821961541 is 1451691288.

It is a happy number.

8821961541 is a `hidden beast` number, since 8 + 8 + 21 + 9 + 615 + 4 + 1 = 666.

It is not a de Polignac number, because 8821961541 - 2² = 8821961537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8821961341) 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, 1097226 + ... + 1105236.

Almost surely, 2^8821961541 is an apocalyptic number.

It is an amenable number.

8821961541 is a deficient number, since it is larger than the sum of its proper divisors (4270864283).

8821961541 is a wasteful number, since it uses less digits than its factorization.

8821961541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11361 (or 11358 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 8821961541 is about 93925.2976625573. The cubic root of 8821961541 is about 2066.2762634246.

The spelling of 8821961541 in words is "eight billion, eight hundred twenty-one million, nine hundred sixty-one thousand, five hundred forty-one".