3915561226612 has 36 divisors (see below), whose sum is σ = 8165377696644. Its totient is φ = 1637168453760.

The previous prime is 3915561226597. The next prime is 3915561226613. The reversal of 3915561226612 is 2166221655193.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2204791401316 + 1710769825296 = 1484854^2 + 1307964^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915561226613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243618223 + ... + 243634294.

It is an arithmetic number, because the mean of its divisors is an integer number (226816047129).

Almost surely, 2^{3915561226612} is an apocalyptic number.

It is an amenable number.

3915561226612 is an abundant number, since it is smaller than the sum of its proper divisors (4249816470032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3915561226612 is a wasteful number, since it uses less digits than its factorization.

3915561226612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487252576 (or 487252567 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

The spelling of 3915561226612 in words is "three trillion, nine hundred fifteen billion, five hundred sixty-one million, two hundred twenty-six thousand, six hundred twelve".