2156756601 has 4 divisors (see below), whose sum is σ = 2875675472. Its totient is φ = 1437837732.

The previous prime is 2156756549. The next prime is 2156756653. The reversal of 2156756601 is 1066576512.

2156756601 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2156756549) and next prime (2156756653).

It is not a de Polignac number, because 2156756601 - 2¹⁰ = 2156755577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156756601.

It is not an unprimeable number, because it can be changed into a prime (2156756681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359459431 + ... + 359459436.

It is an arithmetic number, because the mean of its divisors is an integer number (718918868).

Almost surely, 2^2156756601 is an apocalyptic number.

It is an amenable number.

2156756601 is a deficient number, since it is larger than the sum of its proper divisors (718918871).

2156756601 is an equidigital number, since it uses as much as digits as its factorization.

2156756601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718918870.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 2156756601 is about 46440.8936283530. The cubic root of 2156756601 is about 1292.0134814496.

The spelling of 2156756601 in words is "two billion, one hundred fifty-six million, seven hundred fifty-six thousand, six hundred one".