1491252656 has 40 divisors (see below), whose sum is σ = 3088489824. Its totient is φ = 695805440.

The previous prime is 1491252619. The next prime is 1491252661. The reversal of 1491252656 is 6562521941.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34331 + ... + 64506.

Almost surely, 2^1491252656 is an apocalyptic number.

1491252656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1491252656 is an abundant number, since it is smaller than the sum of its proper divisors (1597237168).

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

1491252656 is a wasteful number, since it uses less digits than its factorization.

1491252656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98909 (or 98903 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 1491252656 is about 38616.7406185452. The cubic root of 1491252656 is about 1142.4847454898.

The spelling of 1491252656 in words is "one billion, four hundred ninety-one million, two hundred fifty-two thousand, six hundred fifty-six".