1605426556 has 12 divisors (see below), whose sum is σ = 2835272440. Its totient is φ = 795348720.

The previous prime is 1605426491. The next prime is 1605426583. The reversal of 1605426556 is 6556245061.

It is a super-2 number, since 2×1605426556² = 5154788853420042272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1840650 + ... + 1841521.

Almost surely, 2^1605426556 is an apocalyptic number.

It is an amenable number.

1605426556 is a deficient number, since it is larger than the sum of its proper divisors (1229845884).

1605426556 is a wasteful number, since it uses less digits than its factorization.

1605426556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682284 (or 3682282 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 1605426556 is about 40067.7745326590. The cubic root of 1605426556 is about 1170.9278820497.

The spelling of 1605426556 in words is "one billion, six hundred five million, four hundred twenty-six thousand, five hundred fifty-six".