157405665705 has 32 divisors (see below), whose sum is σ = 253772037504. Its totient is φ = 83309108736.

The previous prime is 157405665691. The next prime is 157405665727. The reversal of 157405665705 is 507566504751.

157405665705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157405665705 - 2⁷ = 157405665577 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7113639 + ... + 7135731.

It is an arithmetic number, because the mean of its divisors is an integer number (7930376172).

Almost surely, 2^157405665705 is an apocalyptic number.

157405665705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157405665705 is a deficient number, since it is larger than the sum of its proper divisors (96366371799).

157405665705 is a wasteful number, since it uses less digits than its factorization.

157405665705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25705.

The product of its (nonzero) digits is 4410000, while the sum is 51.

The spelling of 157405665705 in words is "one hundred fifty-seven billion, four hundred five million, six hundred sixty-five thousand, seven hundred five".