3956801601 has 4 divisors (see below), whose sum is σ = 5275735472. Its totient is φ = 2637867732.

The previous prime is 3956801581. The next prime is 3956801609. The reversal of 3956801601 is 1061086593.

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 not a de Polignac number, because 3956801601 - 2⁹ = 3956801089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3956801601.

It is not an unprimeable number, because it can be changed into a prime (3956801609) 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, 659466931 + ... + 659466936.

It is an arithmetic number, because the mean of its divisors is an integer number (1318933868).

Almost surely, 2^3956801601 is an apocalyptic number.

It is an amenable number.

3956801601 is a deficient number, since it is larger than the sum of its proper divisors (1318933871).

3956801601 is a wasteful number, since it uses less digits than its factorization.

3956801601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318933870.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 3956801601 is about 62903.1128085089. The cubic root of 3956801601 is about 1581.6659244558.

The spelling of 3956801601 in words is "three billion, nine hundred fifty-six million, eight hundred one thousand, six hundred one".