155775727577551 has 8 divisors (see below), whose sum is σ = 163789063480800. Its totient is φ = 147938508947040.

The previous prime is 155775727577531. The next prime is 155775727577557.

155775727577551 is nontrivially palindromic in base 10.

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 155775727577551 - 2¹⁹ = 155775727053263 is a prime.

It is a super-4 number, since 4×155775727577551⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155775727577557) 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, 44029316371 + ... + 44029319908.

It is an arithmetic number, because the mean of its divisors is an integer number (20473632935100).

Almost surely, 2^{155775727577551} is an apocalyptic number.

155775727577551 is a deficient number, since it is larger than the sum of its proper divisors (8013335903249).

155775727577551 is an equidigital number, since it uses as much as digits as its factorization.

155775727577551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88058636369.

The product of its digits is 3676531250, while the sum is 76.

The spelling of 155775727577551 in words is "one hundred fifty-five trillion, seven hundred seventy-five billion, seven hundred twenty-seven million, five hundred seventy-seven thousand, five hundred fifty-one".