1654065620 has 12 divisors (see below), whose sum is σ = 3473537844. Its totient is φ = 661626240.

The previous prime is 1654065613. The next prime is 1654065641. The reversal of 1654065620 is 265604561.

It can be written as a sum of positive squares in 2 ways, for example, as 551028676 + 1103036944 = 23474^2 + 33212^2 .

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, 41351621 + ... + 41351660.

It is an arithmetic number, because the mean of its divisors is an integer number (289461487).

Almost surely, 2^1654065620 is an apocalyptic number.

1654065620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1654065620 is an abundant number, since it is smaller than the sum of its proper divisors (1819472224).

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

1654065620 is a wasteful number, since it uses less digits than its factorization.

1654065620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82703290 (or 82703288 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1654065620 is about 40670.2055564021. The cubic root of 1654065620 is about 1182.6355006551.

The spelling of 1654065620 in words is "one billion, six hundred fifty-four million, sixty-five thousand, six hundred twenty".