2161477701 has 12 divisors (see below), whose sum is σ = 3132794028. Its totient is φ = 1436065344.

The previous prime is 2161477663. The next prime is 2161477709. The reversal of 2161477701 is 1077741612.

It can be written as a sum of positive squares in 2 ways, for example, as 1623284100 + 538193601 = 40290^2 + 23199^2 .

It is not a de Polignac number, because 2161477701 - 2¹⁰ = 2161476677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161477709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407200 + ... + 412473.

It is an arithmetic number, because the mean of its divisors is an integer number (261066169).

Almost surely, 2^2161477701 is an apocalyptic number.

It is an amenable number.

2161477701 is a deficient number, since it is larger than the sum of its proper divisors (971316327).

2161477701 is a wasteful number, since it uses less digits than its factorization.

2161477701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819972 (or 819969 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

The square root of 2161477701 is about 46491.6949680263. The cubic root of 2161477701 is about 1292.9555255543.

The spelling of 2161477701 in words is "two billion, one hundred sixty-one million, four hundred seventy-seven thousand, seven hundred one".