157520778805 has 16 divisors (see below), whose sum is σ = 215539745904. Its totient is φ = 109480504320.

The previous prime is 157520778803. The next prime is 157520778817. The reversal of 157520778805 is 508877025751.

157520778805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 21727054801 + 135793724004 = 147401^2 + 368502^2 .

It is not a de Polignac number, because 157520778805 - 2¹ = 157520778803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157520778803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71275266 + ... + 71277475.

It is an arithmetic number, because the mean of its divisors is an integer number (13471234119).

Almost surely, 2^157520778805 is an apocalyptic number.

It is an amenable number.

157520778805 is a deficient number, since it is larger than the sum of its proper divisors (58018967099).

157520778805 is a wasteful number, since it uses less digits than its factorization.

157520778805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142552776.

The product of its (nonzero) digits is 5488000, while the sum is 55.

The spelling of 157520778805 in words is "one hundred fifty-seven billion, five hundred twenty million, seven hundred seventy-eight thousand, eight hundred five".