1620257262105 has 16 divisors (see below), whose sum is σ = 2592451632960. Its totient is φ = 864123868608.

The previous prime is 1620257262097. The next prime is 1620257262131. The reversal of 1620257262105 is 5012627520261.

It is not a de Polignac number, because 1620257262105 - 2³ = 1620257262097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212991 + ... + 1812699.

It is an arithmetic number, because the mean of its divisors is an integer number (162028227060).

Almost surely, 2^{1620257262105} is an apocalyptic number.

1620257262105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1620257262105 is a deficient number, since it is larger than the sum of its proper divisors (972194370855).

1620257262105 is a wasteful number, since it uses less digits than its factorization.

1620257262105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667240.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 1620257262105 in words is "one trillion, six hundred twenty billion, two hundred fifty-seven million, two hundred sixty-two thousand, one hundred five".