291434375990 has 16 divisors (see below), whose sum is σ = 524589685200. Its totient is φ = 116572015200.

The previous prime is 291434375987. The next prime is 291434376001. The reversal of 291434375990 is 99573434192.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 655661 + ... + 1006359.

It is an arithmetic number, because the mean of its divisors is an integer number (32786855325).

Almost surely, 2^291434375990 is an apocalyptic number.

291434375990 is a deficient number, since it is larger than the sum of its proper divisors (233155309210).

291434375990 is a wasteful number, since it uses less digits than its factorization.

291434375990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433807.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 291434375990 in words is "two hundred ninety-one billion, four hundred thirty-four million, three hundred seventy-five thousand, nine hundred ninety".