42651590091 has 32 divisors (see below), whose sum is σ = 62948192256. Its totient is φ = 25470900000.

The previous prime is 42651590041. The next prime is 42651590101. The reversal of 42651590091 is 19009515624.

It is not a de Polignac number, because 42651590091 - 2⁶ = 42651590027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42651590041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5270050 + ... + 5278136.

It is an arithmetic number, because the mean of its divisors is an integer number (1967131008).

Almost surely, 2^42651590091 is an apocalyptic number.

42651590091 is a deficient number, since it is larger than the sum of its proper divisors (20296602165).

42651590091 is a wasteful number, since it uses less digits than its factorization.

42651590091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10423.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 42651590091 in words is "forty-two billion, six hundred fifty-one million, five hundred ninety thousand, ninety-one".