613507772401 has 4 divisors (see below), whose sum is σ = 613516488100. Its totient is φ = 613499056704.

The previous prime is 613507772377. The next prime is 613507772419. The reversal of 613507772401 is 104277705316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176884171776 + 436623600625 = 420576^2 + 660775^2 .

It is a cyclic number.

It is not a de Polignac number, because 613507772401 - 2¹⁵ = 613507739633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613507782401) 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, 4251396 + ... + 4393333.

It is an arithmetic number, because the mean of its divisors is an integer number (153379122025).

Almost surely, 2^613507772401 is an apocalyptic number.

It is an amenable number.

613507772401 is a deficient number, since it is larger than the sum of its proper divisors (8715699).

613507772401 is an equidigital number, since it uses as much as digits as its factorization.

613507772401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715698.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 613507772401 in words is "six hundred thirteen billion, five hundred seven million, seven hundred seventy-two thousand, four hundred one".