1491173130496 has 81 divisors (see below), whose sum is σ = 3462801638751. Its totient is φ = 639015584256.

The previous prime is 1491173130443. The next prime is 1491173130521. The reversal of 1491173130496 is 6940313711941.

It is a happy number.

The square root of 1491173130496 is 1221136.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×1491173130496² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 136761781 + ... + 136772683.

Almost surely, 2^{1491173130496} is an apocalyptic number.

1491173130496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1491173130496 is the 1221136-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491173130496

1491173130496 is an abundant number, since it is smaller than the sum of its proper divisors (1971628508255).

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

1491173130496 is an frugal number, since it uses more digits than its factorization.

1491173130496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21836 (or 10912 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

Multiplying 1491173130496 by its sum of digits (49), we get a square (73067483394304 = 8547952²).

1491173130496 divided by its sum of digits (49) gives a square (30432104704 = 174448²).

The spelling of 1491173130496 in words is "one trillion, four hundred ninety-one billion, one hundred seventy-three million, one hundred thirty thousand, four hundred ninety-six".