3626623473661 has 4 divisors (see below), whose sum is σ = 3626627296252. Its totient is φ = 3626619651072.

The previous prime is 3626623473631. The next prime is 3626623473689. The reversal of 3626623473661 is 1663743266263.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2937175564761 + 689447908900 = 1713819^2 + 830330^2 .

It is a cyclic number.

It is not a de Polignac number, because 3626623473661 - 2⁷ = 3626623473533 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 (3626623473631) 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, 711811 + ... + 2785663.

It is an arithmetic number, because the mean of its divisors is an integer number (906656824063).

Almost surely, 2^{3626623473661} is an apocalyptic number.

It is an amenable number.

3626623473661 is a deficient number, since it is larger than the sum of its proper divisors (3822591).

3626623473661 is a wasteful number, since it uses less digits than its factorization.

3626623473661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822590.

The product of its digits is 23514624, while the sum is 55.

The spelling of 3626623473661 in words is "three trillion, six hundred twenty-six billion, six hundred twenty-three million, four hundred seventy-three thousand, six hundred sixty-one".