5418121561 has 16 divisors (see below), whose sum is σ = 5874954624. Its totient is φ = 4976826624.

The previous prime is 5418121549. The next prime is 5418121573. The reversal of 5418121561 is 1651218145.

It is an interprime number because it is at equal distance from previous prime (5418121549) and next prime (5418121573).

It is a cyclic number.

It is not a de Polignac number, because 5418121561 - 2¹³ = 5418113369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5418124561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1301295 + ... + 1305451.

It is an arithmetic number, because the mean of its divisors is an integer number (367184664).

Almost surely, 2^5418121561 is an apocalyptic number.

It is an amenable number.

5418121561 is a deficient number, since it is larger than the sum of its proper divisors (456833063).

5418121561 is a wasteful number, since it uses less digits than its factorization.

5418121561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000.

The product of its digits is 9600, while the sum is 34.

The square root of 5418121561 is about 73607.8906164278. The cubic root of 5418121561 is about 1756.3709615634.

The spelling of 5418121561 in words is "five billion, four hundred eighteen million, one hundred twenty-one thousand, five hundred sixty-one".