1621362075454 has 96 divisors (see below), whose sum is σ = 2865826833408. Its totient is φ = 686216361600.

The previous prime is 1621362075439. The next prime is 1621362075499. The reversal of 1621362075454 is 4545702631261.

It is a super-2 number, since 2×1621362075454² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21575754 + ... + 21650770.

It is an arithmetic number, because the mean of its divisors is an integer number (29852362848).

Almost surely, 2^{1621362075454} is an apocalyptic number.

1621362075454 is a deficient number, since it is larger than the sum of its proper divisors (1244464757954).

1621362075454 is a wasteful number, since it uses less digits than its factorization.

1621362075454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75182 (or 75171 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 1621362075454 in words is "one trillion, six hundred twenty-one billion, three hundred sixty-two million, seventy-five thousand, four hundred fifty-four".