1620676815 has 16 divisors (see below), whose sum is σ = 2599432800. Its totient is φ = 862244352.

The previous prime is 1620676789. The next prime is 1620676819. The reversal of 1620676815 is 5186760261.

It is not a de Polignac number, because 1620676815 - 2¹¹ = 1620674767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620676819) 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, 125950 + ... + 138219.

It is an arithmetic number, because the mean of its divisors is an integer number (162464550).

Almost surely, 2^1620676815 is an apocalyptic number.

1620676815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620676815 is a deficient number, since it is larger than the sum of its proper divisors (978755985).

1620676815 is a wasteful number, since it uses less digits than its factorization.

1620676815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264586.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1620676815 is about 40257.6305189463. The cubic root of 1620676815 is about 1174.6238276737.

The spelling of 1620676815 in words is "one billion, six hundred twenty million, six hundred seventy-six thousand, eight hundred fifteen".