2156730629 has 8 divisors (see below), whose sum is σ = 2215601400. Its totient is φ = 2097890496.

The previous prime is 2156730613. The next prime is 2156730647. The reversal of 2156730629 is 9260376512.

It can be written as a sum of positive squares in 4 ways, for example, as 140541025 + 2016189604 = 11855^2 + 44902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156730629 - 2⁴ = 2156730613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156730649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267347 + ... + 275295.

It is an arithmetic number, because the mean of its divisors is an integer number (276950175).

Almost surely, 2^2156730629 is an apocalyptic number.

It is an amenable number.

2156730629 is a deficient number, since it is larger than the sum of its proper divisors (58870771).

2156730629 is an equidigital number, since it uses as much as digits as its factorization.

2156730629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15319.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 2156730629 is about 46440.6140032623. The cubic root of 2156730629 is about 1292.0082952194.

The spelling of 2156730629 in words is "two billion, one hundred fifty-six million, seven hundred thirty thousand, six hundred twenty-nine".