157620230442 has 24 divisors (see below), whose sum is σ = 341632533060. Its totient is φ = 52521302400.

The previous prime is 157620230389. The next prime is 157620230483. The reversal of 157620230442 is 244032026751.

157620230442 is a `hidden beast` number, since 1 + 5 + 7 + 6 + 202 + 3 + 0 + 442 = 666.

157620230442 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 2 ways, for example, as 150575817681 + 7044412761 = 388041^2 + 83931^2 .

It is a junction number, because it is equal to n+sod(n) for n = 157620230397 and 157620230406.

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 11 ways as a sum of consecutive naturals, for example, 1512717 + ... + 1613552.

Almost surely, 2^157620230442 is an apocalyptic number.

157620230442 is an abundant number, since it is smaller than the sum of its proper divisors (184012302618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157620230442 is a wasteful number, since it uses less digits than its factorization.

157620230442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129078 (or 3129075 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 157620230442 in words is "one hundred fifty-seven billion, six hundred twenty million, two hundred thirty thousand, four hundred forty-two".