1539974209445 has 16 divisors (see below), whose sum is σ = 2135694574080. Its totient is φ = 1044117343104.

The previous prime is 1539974209441. The next prime is 1539974209457. The reversal of 1539974209445 is 5449024799351.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1539974209445 - 2² = 1539974209441 is a prime.

It is a super-3 number, since 3×1539974209445³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539974209441) 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, 247183757 + ... + 247189986.

It is an arithmetic number, because the mean of its divisors is an integer number (133480910880).

Almost surely, 2^{1539974209445} is an apocalyptic number.

It is an amenable number.

1539974209445 is a deficient number, since it is larger than the sum of its proper divisors (595720364635).

1539974209445 is an equidigital number, since it uses as much as digits as its factorization.

1539974209445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494373844.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 1539974209445 in words is "one trillion, five hundred thirty-nine billion, nine hundred seventy-four million, two hundred nine thousand, four hundred forty-five".