157742078 has 32 divisors (see below), whose sum is σ = 265779360. Its totient is φ = 69713280.

The previous prime is 157742077. The next prime is 157742089. The reversal of 157742078 is 870247751.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157742077) 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, 97976 + ... + 99572.

It is an arithmetic number, because the mean of its divisors is an integer number (8305605).

Almost surely, 2^157742078 is an apocalyptic number.

157742078 is a deficient number, since it is larger than the sum of its proper divisors (108037282).

157742078 is a wasteful number, since it uses less digits than its factorization.

157742078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its (nonzero) digits is 109760, while the sum is 41.

The square root of 157742078 is about 12559.5413132805. The cubic root of 157742078 is about 540.3176891486.

The spelling of 157742078 in words is "one hundred fifty-seven million, seven hundred forty-two thousand, seventy-eight".