42157834551 has 24 divisors (see below), whose sum is σ = 71212352640. Its totient is φ = 23529952656.

The previous prime is 42157834549. The next prime is 42157834601. The reversal of 42157834551 is 15543875124.

42157834551 is a `hidden beast` number, since 4 + 2 + 15 + 7 + 83 + 4 + 551 = 666.

It is not a de Polignac number, because 42157834551 - 2¹ = 42157834549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42157834497 and 42157834506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42157834351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7778361 + ... + 7783778.

It is an arithmetic number, because the mean of its divisors is an integer number (2967181360).

Almost surely, 2^42157834551 is an apocalyptic number.

42157834551 is a deficient number, since it is larger than the sum of its proper divisors (29054518089).

42157834551 is a wasteful number, since it uses less digits than its factorization.

42157834551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15562195 (or 15562192 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 42157834551 in words is "forty-two billion, one hundred fifty-seven million, eight hundred thirty-four thousand, five hundred fifty-one".