42730811551 has 4 divisors (see below), whose sum is σ = 42786091512. Its totient is φ = 42675531592.

The previous prime is 42730811549. The next prime is 42730811573. The reversal of 42730811551 is 15511803724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42730811551 - 2¹ = 42730811549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42730811551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42730811251) 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, 27638821 + ... + 27640366.

It is an arithmetic number, because the mean of its divisors is an integer number (10696522878).

Almost surely, 2^42730811551 is an apocalyptic number.

42730811551 is a deficient number, since it is larger than the sum of its proper divisors (55279961).

42730811551 is an equidigital number, since it uses as much as digits as its factorization.

42730811551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55279960.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 42730811551 in words is "forty-two billion, seven hundred thirty million, eight hundred eleven thousand, five hundred fifty-one".