157657256741 has 4 divisors (see below), whose sum is σ = 163093713900. Its totient is φ = 152220799584.

The previous prime is 157657256737. The next prime is 157657256761. The reversal of 157657256741 is 147652756751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 147652756751 = 149 ⋅990958099.

It can be written as a sum of positive squares in 2 ways, for example, as 81312803716 + 76344453025 = 285154^2 + 276305^2 .

It is a cyclic number.

It is not a de Polignac number, because 157657256741 - 2² = 157657256737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157657256761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2718228536 + ... + 2718228593.

It is an arithmetic number, because the mean of its divisors is an integer number (40773428475).

Almost surely, 2^157657256741 is an apocalyptic number.

It is an amenable number.

157657256741 is a deficient number, since it is larger than the sum of its proper divisors (5436457159).

157657256741 is an equidigital number, since it uses as much as digits as its factorization.

157657256741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436457158.

The product of its digits is 12348000, while the sum is 56.

The spelling of 157657256741 in words is "one hundred fifty-seven billion, six hundred fifty-seven million, two hundred fifty-six thousand, seven hundred forty-one".