3722742115861 has 4 divisors (see below), whose sum is σ = 3722751358272. Its totient is φ = 3722732873452.

The previous prime is 3722742115783. The next prime is 3722742115879. The reversal of 3722742115861 is 1685112472273.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 3722742115861 - 2²⁷ = 3722607898133 is a prime.

It is a super-2 number, since 2×3722742115861² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3722742115891) 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, 3988111 + ... + 4832236.

It is an arithmetic number, because the mean of its divisors is an integer number (930687839568).

Almost surely, 2^{3722742115861} is an apocalyptic number.

It is an amenable number.

3722742115861 is a deficient number, since it is larger than the sum of its proper divisors (9242411).

3722742115861 is an equidigital number, since it uses as much as digits as its factorization.

3722742115861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9242410.

The product of its digits is 1128960, while the sum is 49.

The spelling of 3722742115861 in words is "three trillion, seven hundred twenty-two billion, seven hundred forty-two million, one hundred fifteen thousand, eight hundred sixty-one".