1620026540451 has 24 divisors (see below), whose sum is σ = 2585082639360. Its totient is φ = 969405980400.

The previous prime is 1620026540413. The next prime is 1620026540519. The reversal of 1620026540451 is 1540456200261.

1620026540451 is a `hidden beast` number, since 1 + 62 + 0 + 0 + 2 + 6 + 540 + 4 + 51 = 666.

It is not a de Polignac number, because 1620026540451 - 2⁶ = 1620026540387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620026540411) 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 23 ways as a sum of consecutive naturals, for example, 103561195 + ... + 103576836.

It is an arithmetic number, because the mean of its divisors is an integer number (107711776640).

Almost surely, 2^{1620026540451} is an apocalyptic number.

1620026540451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1620026540451 is a deficient number, since it is larger than the sum of its proper divisors (965056098909).

1620026540451 is a wasteful number, since it uses less digits than its factorization.

1620026540451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207138127 (or 207138124 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 1620026540451 in words is "one trillion, six hundred twenty billion, twenty-six million, five hundred forty thousand, four hundred fifty-one".