157828126719 has 4 divisors (see below), whose sum is σ = 210437502296. Its totient is φ = 105218751144.

The previous prime is 157828126639. The next prime is 157828126723. The reversal of 157828126719 is 917621828751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917621828751 = 3 ⋅305873942917.

It is a de Polignac number, because none of the positive numbers 2^k-157828126719 is a prime.

It is a super-2 number, since 2×157828126719² (a number of 23 digits) contains 22 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 (157828126759) 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, 26304687784 + ... + 26304687789.

It is an arithmetic number, because the mean of its divisors is an integer number (52609375574).

Almost surely, 2^157828126719 is an apocalyptic number.

157828126719 is a deficient number, since it is larger than the sum of its proper divisors (52609375577).

157828126719 is an equidigital number, since it uses as much as digits as its factorization.

157828126719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52609375576.

The product of its digits is 3386880, while the sum is 57.

The spelling of 157828126719 in words is "one hundred fifty-seven billion, eight hundred twenty-eight million, one hundred twenty-six thousand, seven hundred nineteen".