1491767616 has 112 divisors (see below), whose sum is σ = 4174345728. Its totient is φ = 469401600.

The previous prime is 1491767593. The next prime is 1491767617. The reversal of 1491767616 is 6167671941.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491767617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240976 + ... + 247088.

It is an arithmetic number, because the mean of its divisors is an integer number (37270944).

Almost surely, 2^1491767616 is an apocalyptic number.

1491767616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491767616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087172864).

1491767616 is an abundant number, since it is smaller than the sum of its proper divisors (2682578112).

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

1491767616 is a wasteful number, since it uses less digits than its factorization.

1491767616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200 (or 6190 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 1491767616 is about 38623.4076176611. The cubic root of 1491767616 is about 1142.6162381276.

The spelling of 1491767616 in words is "one billion, four hundred ninety-one million, seven hundred sixty-seven thousand, six hundred sixteen".