255577407498 has 96 divisors (see below), whose sum is σ = 639703733760. Its totient is φ = 72233026560.

The previous prime is 255577407493. The next prime is 255577407509. The reversal of 255577407498 is 894704775552.

255577407498 is a `hidden beast` number, since 2 + 5 + 557 + 7 + 4 + 0 + 74 + 9 + 8 = 666.

It is a super-2 number, since 2×255577407498² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (255577407493) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32641048 + ... + 32648876.

It is an arithmetic number, because the mean of its divisors is an integer number (6663580560).

Almost surely, 2^255577407498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255577407498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319851866880).

255577407498 is an abundant number, since it is smaller than the sum of its proper divisors (384126326262).

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

255577407498 is a wasteful number, since it uses less digits than its factorization.

255577407498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612 (or 10609 counting only the distinct ones).

The product of its (nonzero) digits is 98784000, while the sum is 63.

The spelling of 255577407498 in words is "two hundred fifty-five billion, five hundred seventy-seven million, four hundred seven thousand, four hundred ninety-eight".