248711640821 has 64 divisors (see below), whose sum is σ = 314288916480. Its totient is φ = 192047708160.

The previous prime is 248711640817. The next prime is 248711640839. The reversal of 248711640821 is 128046117842.

It is not a de Polignac number, because 248711640821 - 2² = 248711640817 is a prime.

It is a super-2 number, since 2×248711640821² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248711640811) 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, 160148381 + ... + 160149933.

It is an arithmetic number, because the mean of its divisors is an integer number (4910764320).

Almost surely, 2^248711640821 is an apocalyptic number.

It is an amenable number.

248711640821 is a deficient number, since it is larger than the sum of its proper divisors (65577275659).

248711640821 is a wasteful number, since it uses less digits than its factorization.

248711640821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346.

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 248711640821 in words is "two hundred forty-eight billion, seven hundred eleven million, six hundred forty thousand, eight hundred twenty-one".