1491881473476 has 63 divisors (see below), whose sum is σ = 3914571266431. Its totient is φ = 497271838824.

The previous prime is 1491881473457. The next prime is 1491881473483. The reversal of 1491881473476 is 6743741881941.

The square root of 1491881473476 is 1221426.

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

1491881473476 is a `hidden beast` number, since 1 + 4 + 9 + 1 + 88 + 14 + 73 + 476 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 65945695 + ... + 65968313.

Almost surely, 2^{1491881473476} is an apocalyptic number.

1491881473476 is the 1221426-th square number.

It is an amenable number.

1491881473476 is an abundant number, since it is smaller than the sum of its proper divisors (2422689792955).

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

1491881473476 is an frugal number, since it uses more digits than its factorization.

1491881473476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45260 (or 22624 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 1491881473476 in words is "one trillion, four hundred ninety-one billion, eight hundred eighty-one million, four hundred seventy-three thousand, four hundred seventy-six".