2621542161 has 32 divisors (see below), whose sum is σ = 4070699776. Its totient is φ = 1469664000.

The previous prime is 2621542153. The next prime is 2621542169. The reversal of 2621542161 is 1612451262.

It is an interprime number because it is at equal distance from previous prime (2621542153) and next prime (2621542169).

It is not a de Polignac number, because 2621542161 - 2³ = 2621542153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621542169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536871 + ... + 541731.

It is an arithmetic number, because the mean of its divisors is an integer number (127209368).

Almost surely, 2^2621542161 is an apocalyptic number.

2621542161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2621542161 is a deficient number, since it is larger than the sum of its proper divisors (1449157615).

2621542161 is a wasteful number, since it uses less digits than its factorization.

2621542161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353.

The product of its digits is 5760, while the sum is 30.

The square root of 2621542161 is about 51200.9976562957. The cubic root of 2621542161 is about 1378.8561131067.

The spelling of 2621542161 in words is "two billion, six hundred twenty-one million, five hundred forty-two thousand, one hundred sixty-one".