1620042511407 has 16 divisors (see below), whose sum is σ = 2187877923840. Its totient is φ = 1066123704672.

The previous prime is 1620042511391. The next prime is 1620042511421. The reversal of 1620042511407 is 7041152400261.

It is not a de Polignac number, because 1620042511407 - 2⁴ = 1620042511391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620042511007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340413 + ... + 1831929.

It is an arithmetic number, because the mean of its divisors is an integer number (136742370240).

Almost surely, 2^{1620042511407} is an apocalyptic number.

1620042511407 is a deficient number, since it is larger than the sum of its proper divisors (567835412433).

1620042511407 is a wasteful number, since it uses less digits than its factorization.

1620042511407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496182.

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 1620042511407 its reverse (7041152400261), we get a palindrome (8661194911668).

The spelling of 1620042511407 in words is "one trillion, six hundred twenty billion, forty-two million, five hundred eleven thousand, four hundred seven".