155613678391709 has 16 divisors (see below), whose sum is σ = 157918126227840. Its totient is φ = 153312388057920.

The previous prime is 155613678391657. The next prime is 155613678391757. The reversal of 155613678391709 is 907193876316551.

It is a cyclic number.

It is not a de Polignac number, because 155613678391709 - 2¹⁶ = 155613678326173 is a prime.

It is a super-3 number, since 3×155613678391709³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155613678391789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851126387 + ... + 851309199.

It is an arithmetic number, because the mean of its divisors is an integer number (9869882889240).

Almost surely, 2^{155613678391709} is an apocalyptic number.

It is an amenable number.

155613678391709 is a deficient number, since it is larger than the sum of its proper divisors (2304447836131).

155613678391709 is a wasteful number, since it uses less digits than its factorization.

155613678391709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191380.

The product of its (nonzero) digits is 257191200, while the sum is 71.

The spelling of 155613678391709 in words is "one hundred fifty-five trillion, six hundred thirteen billion, six hundred seventy-eight million, three hundred ninety-one thousand, seven hundred nine".