1061561808 has 40 divisors (see below), whose sum is σ = 3047076800. Its totient is φ = 353853792.

The previous prime is 1061561779. The next prime is 1061561867. The reversal of 1061561808 is 8081651601.

1061561808 is a `hidden beast` number, since 10 + 6 + 1 + 561 + 80 + 8 = 666.

1061561808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1061561808² = 2253826944408457728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228228 + ... + 1229091.

It is an arithmetic number, because the mean of its divisors is an integer number (76176920).

Almost surely, 2^1061561808 is an apocalyptic number.

1061561808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1061561808 is an abundant number, since it is smaller than the sum of its proper divisors (1985514992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1061561808 is a wasteful number, since it uses less digits than its factorization.

1061561808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457336 (or 2457324 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1061561808 is about 32581.6176393991. The cubic root of 1061561808 is about 1020.1133438060.

The spelling of 1061561808 in words is "one billion, sixty-one million, five hundred sixty-one thousand, eight hundred eight".