30426991287 has 32 divisors (see below), whose sum is σ = 50614609920. Its totient is φ = 15795393120.

The previous prime is 30426991277. The next prime is 30426991291. The reversal of 30426991287 is 78219962403.

It is not a de Polignac number, because 30426991287 - 2⁷ = 30426991159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30426991237) 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 31 ways as a sum of consecutive naturals, for example, 298164 + ... + 386982.

It is an arithmetic number, because the mean of its divisors is an integer number (1581706560).

Almost surely, 2^30426991287 is an apocalyptic number.

30426991287 is a deficient number, since it is larger than the sum of its proper divisors (20187618633).

30426991287 is a wasteful number, since it uses less digits than its factorization.

30426991287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90323.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 30426991287 in words is "thirty billion, four hundred twenty-six million, nine hundred ninety-one thousand, two hundred eighty-seven".