1655850040 has 64 divisors (see below), whose sum is σ = 4186728000. Its totient is φ = 584804352.

The previous prime is 1655850037. The next prime is 1655850047. The reversal of 1655850040 is 400585561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1655849978 and 1655850005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655850047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57265 + ... + 81184.

It is an arithmetic number, because the mean of its divisors is an integer number (65417625).

Almost surely, 2^1655850040 is an apocalyptic number.

1655850040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655850040 is an abundant number, since it is smaller than the sum of its proper divisors (2530877960).

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

1655850040 is a wasteful number, since it uses less digits than its factorization.

1655850040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138496 (or 138492 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 1655850040 is about 40692.1373240581. The cubic root of 1655850040 is about 1183.0606268800.

The spelling of 1655850040 in words is "one billion, six hundred fifty-five million, eight hundred fifty thousand, forty".