155577428807 has 4 divisors (see below), whose sum is σ = 158214334440. Its totient is φ = 152940523176.

The previous prime is 155577428771. The next prime is 155577428819. The reversal of 155577428807 is 708824775551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708824775551 = 1663 ⋅426232577.

It is a cyclic number.

It is not a de Polignac number, because 155577428807 - 2²⁸ = 155308993351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 2636905573 = 155577428807 / (1 + 5 + 5 + 5 + 7 + 7 + 4 + 2 + 8 + 8 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155577428827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318452728 + ... + 1318452845.

It is an arithmetic number, because the mean of its divisors is an integer number (39553583610).

Almost surely, 2^155577428807 is an apocalyptic number.

155577428807 is a deficient number, since it is larger than the sum of its proper divisors (2636905633).

155577428807 is an equidigital number, since it uses as much as digits as its factorization.

155577428807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636905632.

The product of its (nonzero) digits is 21952000, while the sum is 59.

The spelling of 155577428807 in words is "one hundred fifty-five billion, five hundred seventy-seven million, four hundred twenty-eight thousand, eight hundred seven".