1491455499625 has 128 divisors (see below), whose sum is σ = 2413316505600. Its totient is φ = 893663020800.

The previous prime is 1491455499619. The next prime is 1491455499629. The reversal of 1491455499625 is 5269945541941.

It is not a de Polignac number, because 1491455499625 - 2¹³ = 1491455491433 is a prime.

Its product of digits (69984000) is a multiple of the sum of its prime factors (5400).

It is not an unprimeable number, because it can be changed into a prime (1491455499629) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 470934792 + ... + 470937958.

It is an arithmetic number, because the mean of its divisors is an integer number (18854035200).

Almost surely, 2^{1491455499625} is an apocalyptic number.

It is an amenable number.

1491455499625 is a deficient number, since it is larger than the sum of its proper divisors (921861005975).

1491455499625 is a wasteful number, since it uses less digits than its factorization.

1491455499625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400 (or 5390 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 64.

The spelling of 1491455499625 in words is "one trillion, four hundred ninety-one billion, four hundred fifty-five million, four hundred ninety-nine thousand, six hundred twenty-five".