655555415040 has 528 divisors, whose sum is σ = 2356154119488. Its totient is φ = 168393572352.

The previous prime is 655555415017. The next prime is 655555415057. The reversal of 655555415040 is 40514555556.

It is a happy number.

655555415040 is a `hidden beast` number, since 6 + 5 + 5 + 5 + 554 + 1 + 50 + 40 = 666.

655555415040 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175609014 + ... + 175612746.

Almost surely, 2^655555415040 is an apocalyptic number.

655555415040 is a gapful number since it is divisible by the number (60) 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 655555415040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1178077059744).

655555415040 is an abundant number, since it is smaller than the sum of its proper divisors (1700598704448).

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

655555415040 is a wasteful number, since it uses less digits than its factorization.

655555415040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904 (or 3883 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 45.

The spelling of 655555415040 in words is "six hundred fifty-five billion, five hundred fifty-five million, four hundred fifteen thousand, forty".