1291391390150 has 24 divisors (see below), whose sum is σ = 2408792517144. Its totient is φ = 515093216000.

The previous prime is 1291391390147. The next prime is 1291391390189. The reversal of 1291391390150 is 510931931921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36565676 + ... + 36600975.

It is an arithmetic number, because the mean of its divisors is an integer number (100366354881).

Almost surely, 2^{1291391390150} is an apocalyptic number.

1291391390150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291391390150 is a deficient number, since it is larger than the sum of its proper divisors (1117401126994).

1291391390150 is a wasteful number, since it uses less digits than its factorization.

1291391390150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73167016 (or 73167011 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 44.

The spelling of 1291391390150 in words is "one trillion, two hundred ninety-one billion, three hundred ninety-one million, three hundred ninety thousand, one hundred fifty".