1620268461 has 32 divisors (see below), whose sum is σ = 2757300480. Its totient is φ = 921146688.

The previous prime is 1620268457. The next prime is 1620268477. The reversal of 1620268461 is 1648620261.

1620268461 is a `hidden beast` number, since 1 + 620 + 26 + 8 + 4 + 6 + 1 = 666.

It is not a de Polignac number, because 1620268461 - 2² = 1620268457 is a prime.

It is a super-2 number, since 2×1620268461² = 5250539771422617042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620268421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15475 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (86165640).

Almost surely, 2^1620268461 is an apocalyptic number.

It is an amenable number.

1620268461 is a deficient number, since it is larger than the sum of its proper divisors (1137032019).

1620268461 is a wasteful number, since it uses less digits than its factorization.

1620268461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43730 (or 43724 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1620268461 is about 40252.5584404271. The cubic root of 1620268461 is about 1174.5251646489.

The spelling of 1620268461 in words is "one billion, six hundred twenty million, two hundred sixty-eight thousand, four hundred sixty-one".