1491151772 has 24 divisors (see below), whose sum is σ = 2881049472. Its totient is φ = 669628400.

The previous prime is 1491151757. The next prime is 1491151777. The reversal of 1491151772 is 2771511941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491151777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200504 + ... + 207807.

It is an arithmetic number, because the mean of its divisors is an integer number (120043728).

Almost surely, 2^1491151772 is an apocalyptic number.

It is an amenable number.

1491151772 is a deficient number, since it is larger than the sum of its proper divisors (1389897700).

1491151772 is a wasteful number, since it uses less digits than its factorization.

1491151772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408409 (or 408407 counting only the distinct ones).

The product of its digits is 17640, while the sum is 38.

The square root of 1491151772 is about 38615.4343753893. The cubic root of 1491151772 is about 1142.4589816843.

The spelling of 1491151772 in words is "one billion, four hundred ninety-one million, one hundred fifty-one thousand, seven hundred seventy-two".