1426580991 has 80 divisors (see below), whose sum is σ = 2415605280. Its totient is φ = 831409920.

The previous prime is 1426580977. The next prime is 1426580999. The reversal of 1426580991 is 1990856241.

It is not a de Polignac number, because 1426580991 - 2⁶ = 1426580927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426580999) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3593205 + ... + 3593601.

It is an arithmetic number, because the mean of its divisors is an integer number (30195066).

Almost surely, 2^1426580991 is an apocalyptic number.

1426580991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1426580991 is a deficient number, since it is larger than the sum of its proper divisors (989024289).

1426580991 is a wasteful number, since it uses less digits than its factorization.

1426580991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1426580991 is about 37770.1071086647. The cubic root of 1426580991 is about 1125.7245679010.

The spelling of 1426580991 in words is "one billion, four hundred twenty-six million, five hundred eighty thousand, nine hundred ninety-one".