3952145861 has 4 divisors (see below), whose sum is σ = 4058960652. Its totient is φ = 3845331072.

The previous prime is 3952145849. The next prime is 3952145903. The reversal of 3952145861 is 1685412593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1685412593 = 26321 ⋅64033.

It can be written as a sum of positive squares in 2 ways, for example, as 3026100100 + 926045761 = 55010^2 + 30431^2 .

It is a cyclic number.

It is not a de Polignac number, because 3952145861 - 2⁶ = 3952145797 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 (3952145831) 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, 53407340 + ... + 53407413.

It is an arithmetic number, because the mean of its divisors is an integer number (1014740163).

Almost surely, 2^3952145861 is an apocalyptic number.

It is an amenable number.

3952145861 is a deficient number, since it is larger than the sum of its proper divisors (106814791).

3952145861 is a wasteful number, since it uses less digits than its factorization.

3952145861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106814790.

The product of its digits is 259200, while the sum is 44.

The square root of 3952145861 is about 62866.0946854503. The cubic root of 3952145861 is about 1581.0453293271.

The spelling of 3952145861 in words is "three billion, nine hundred fifty-two million, one hundred forty-five thousand, eight hundred sixty-one".