1491263288370 has 96 divisors (see below), whose sum is σ = 3972354369984. Its totient is φ = 387942307200.

The previous prime is 1491263288369. The next prime is 1491263288401. The reversal of 1491263288370 is 738823621941.

It is a happy number.

1491263288370 is a `hidden beast` number, since 1 + 4 + 9 + 1 + 263 + 2 + 8 + 8 + 370 = 666.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 2901000 + ... + 3376140.

It is an arithmetic number, because the mean of its divisors is an integer number (41378691354).

Almost surely, 2^{1491263288370} is an apocalyptic number.

1491263288370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491263288370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986177184992).

1491263288370 is an abundant number, since it is smaller than the sum of its proper divisors (2481091081614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491263288370 is a wasteful number, since it uses less digits than its factorization.

1491263288370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476008 (or 476005 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1491263288370 in words is "one trillion, four hundred ninety-one billion, two hundred sixty-three million, two hundred eighty-eight thousand, three hundred seventy".