248505097555 has 64 divisors (see below), whose sum is σ = 383740156800. Its totient is φ = 151600619520.

The previous prime is 248505097553. The next prime is 248505097571. The reversal of 248505097555 is 555790505842.

248505097555 is a nontrivial binomial coefficient, being equal to C(704990, 2).

It is not a de Polignac number, because 248505097555 - 2¹ = 248505097553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 248505097496 and 248505097505.

It is not an unprimeable number, because it can be changed into a prime (248505097553) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1 + ... + 704989.

It is an arithmetic number, because the mean of its divisors is an integer number (5995939950).

Almost surely, 2^248505097555 is an apocalyptic number.

248505097555 is the 704989-th triangular number and also the 352495-th hexagonal number.

248505097555 is the 234997-th centered nonagonal number.

248505097555 is a deficient number, since it is larger than the sum of its proper divisors (135235059245).

248505097555 is a wasteful number, since it uses less digits than its factorization.

248505097555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705064.

The product of its (nonzero) digits is 12600000, while the sum is 55.

The spelling of 248505097555 in words is "two hundred forty-eight billion, five hundred five million, ninety-seven thousand, five hundred fifty-five".