1655122040 has 128 divisors (see below), whose sum is σ = 4632707520. Its totient is φ = 522854400.

The previous prime is 1655122013. The next prime is 1655122069. The reversal of 1655122040 is 402215561.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88730 + ... + 105750.

Almost surely, 2^1655122040 is an apocalyptic number.

1655122040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655122040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2316353760).

1655122040 is an abundant number, since it is smaller than the sum of its proper divisors (2977585480).

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

1655122040 is a wasteful number, since it uses less digits than its factorization.

1655122040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073 (or 17069 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1655122040 is about 40683.1911236078. The cubic root of 1655122040 is about 1182.8872226131.

The spelling of 1655122040 in words is "one billion, six hundred fifty-five million, one hundred twenty-two thousand, forty".