1491860197736 has 8 divisors (see below), whose sum is σ = 2797237870770. Its totient is φ = 745930098864.

The previous prime is 1491860197727. The next prime is 1491860197739. The reversal of 1491860197736 is 6377910681941.

It can be written as a sum of positive squares in only one way, i.e., 1387434275236 + 104425922500 = 1177894^2 + 323150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1491860197739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93241262351 + ... + 93241262366.

Almost surely, 2^{1491860197736} is an apocalyptic number.

It is an amenable number.

1491860197736 is a deficient number, since it is larger than the sum of its proper divisors (1305377673034).

1491860197736 is a wasteful number, since it uses less digits than its factorization.

1491860197736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186482524723 (or 186482524719 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 1491860197736 in words is "one trillion, four hundred ninety-one billion, eight hundred sixty million, one hundred ninety-seven thousand, seven hundred thirty-six".