1491879030625 has 15 divisors (see below), whose sum is σ = 1864290194767. Its totient is φ = 1193478796000.

The previous prime is 1491879030619. The next prime is 1491879030641. The reversal of 1491879030625 is 5260309781941.

It is a happy number.

The square root of 1491879030625 is 1221425.

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

It can be written as a sum of positive squares in 7 ways, for example, as 147615018849 + 1344264011776 = 384207^2 + 1159424^2 .

It is not a de Polignac number, because 1491879030625 - 2⁷ = 1491879030497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 30511197 + ... + 30560053.

It is a 1-persistent number, because it is pandigital, but 2⋅1491879030625 = 2983758061250 is not.

Almost surely, 2^{1491879030625} is an apocalyptic number.

1491879030625 is the 1221425-th square number.

1491879030625 is the 610713-rd centered octagonal number.

It is an amenable number.

1491879030625 is a deficient number, since it is larger than the sum of its proper divisors (372411164142).

1491879030625 is an frugal number, since it uses more digits than its factorization.

1491879030625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97734 (or 48862 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 1491879030625 in words is "one trillion, four hundred ninety-one billion, eight hundred seventy-nine million, thirty thousand, six hundred twenty-five".