1321954149554 has 8 divisors (see below), whose sum is σ = 1984154505708. Its totient is φ = 660569314320.

The previous prime is 1321954149521. The next prime is 1321954149557. The reversal of 1321954149554 is 4559414591231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1308111450529 + 13842699025 = 1143727^2 + 117655^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1321954149496 and 1321954149505.

It is not an unprimeable number, because it can be changed into a prime (1321954149557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203876177 + ... + 203882660.

Almost surely, 2^{1321954149554} is an apocalyptic number.

1321954149554 is a deficient number, since it is larger than the sum of its proper divisors (662200356154).

1321954149554 is a wasteful number, since it uses less digits than its factorization.

1321954149554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407760460.

The product of its digits is 3888000, while the sum is 53.

The spelling of 1321954149554 in words is "one trillion, three hundred twenty-one billion, nine hundred fifty-four million, one hundred forty-nine thousand, five hundred fifty-four".