611861802401 has 8 divisors (see below), whose sum is σ = 618230607624. Its totient is φ = 605494241280.

The previous prime is 611861802397. The next prime is 611861802451. The reversal of 611861802401 is 104208168116.

It can be written as a sum of positive squares in 4 ways, for example, as 116458387600 + 495403414801 = 341260^2 + 703849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611861802401 - 2² = 611861802397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611861802451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694541 + ... + 1306181.

It is an arithmetic number, because the mean of its divisors is an integer number (77278825953).

Almost surely, 2^611861802401 is an apocalyptic number.

It is an amenable number.

611861802401 is a deficient number, since it is larger than the sum of its proper divisors (6368805223).

611861802401 is a wasteful number, since it uses less digits than its factorization.

611861802401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622051.

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 611861802401 in words is "six hundred eleven billion, eight hundred sixty-one million, eight hundred two thousand, four hundred one".