1537349454921 has 8 divisors (see below), whose sum is σ = 2342627740864. Its totient is φ = 878485402800.

The previous prime is 1537349454827. The next prime is 1537349454947. The reversal of 1537349454921 is 1294549437351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1537349454921 - 2⁷ = 1537349454793 is a prime.

It is a super-2 number, since 2×1537349454921² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1537349454961) 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 in 7 ways as a sum of consecutive naturals, for example, 36603558430 + ... + 36603558471.

It is an arithmetic number, because the mean of its divisors is an integer number (292828467608).

Almost surely, 2^{1537349454921} is an apocalyptic number.

It is an amenable number.

1537349454921 is a deficient number, since it is larger than the sum of its proper divisors (805278285943).

1537349454921 is an equidigital number, since it uses as much as digits as its factorization.

1537349454921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73207116911.

The product of its digits is 16329600, while the sum is 57.

The spelling of 1537349454921 in words is "one trillion, five hundred thirty-seven billion, three hundred forty-nine million, four hundred fifty-four thousand, nine hundred twenty-one".