1621463321361 has 32 divisors (see below), whose sum is σ = 2432316321792. Its totient is φ = 954001500480.

The previous prime is 1621463321353. The next prime is 1621463321393. The reversal of 1621463321361 is 1631233641261.

It is not a de Polignac number, because 1621463321361 - 2³ = 1621463321353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1621463321321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7978935 + ... + 8179628.

It is an arithmetic number, because the mean of its divisors is an integer number (76009885056).

Almost surely, 2^{1621463321361} is an apocalyptic number.

It is an amenable number.

1621463321361 is a deficient number, since it is larger than the sum of its proper divisors (810853000431).

1621463321361 is a wasteful number, since it uses less digits than its factorization.

1621463321361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16158693.

The product of its digits is 93312, while the sum is 39.

The spelling of 1621463321361 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-three million, three hundred twenty-one thousand, three hundred sixty-one".