2151644061 has 16 divisors (see below), whose sum is σ = 3309341184. Its totient is φ = 1218018864.

The previous prime is 2151644003. The next prime is 2151644093. The reversal of 2151644061 is 1604461512.

It is not a de Polignac number, because 2151644061 - 2¹¹ = 2151642013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151646061) 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, 476535 + ... + 481028.

It is an arithmetic number, because the mean of its divisors is an integer number (206833824).

Almost surely, 2^2151644061 is an apocalyptic number.

2151644061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2151644061 is a deficient number, since it is larger than the sum of its proper divisors (1157697123).

2151644061 is a wasteful number, since it uses less digits than its factorization.

2151644061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957680.

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

The square root of 2151644061 is about 46385.8174553387. The cubic root of 2151644061 is about 1290.9917780183.

The spelling of 2151644061 in words is "two billion, one hundred fifty-one million, six hundred forty-four thousand, sixty-one".