2072156461 has 2 divisors, whose sum is σ = 2072156462. Its totient is φ = 2072156460.

The previous prime is 2072156453. The next prime is 2072156479. The reversal of 2072156461 is 1646512702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2029502500 + 42653961 = 45050^2 + 6531^2 .

It is a cyclic number.

It is not a de Polignac number, because 2072156461 - 2³ = 2072156453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2072156431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1036078230 + 1036078231.

It is an arithmetic number, because the mean of its divisors is an integer number (1036078231).

Almost surely, 2^2072156461 is an apocalyptic number.

It is an amenable number.

2072156461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2072156461 is an equidigital number, since it uses as much as digits as its factorization.

2072156461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 2072156461 is about 45520.9452999386. The cubic root of 2072156461 is about 1274.8943059380.

The spelling of 2072156461 in words is "two billion, seventy-two million, one hundred fifty-six thousand, four hundred sixty-one".