1020400243524 has 48 divisors (see below), whose sum is σ = 2646794270400. Its totient is φ = 339964708608.

The previous prime is 1020400243463. The next prime is 1020400243547. The reversal of 1020400243524 is 4253420040201.

1020400243524 is a `hidden beast` number, since 1 + 0 + 204 + 0 + 0 + 2 + 435 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2124294 + ... + 2559965.

It is an arithmetic number, because the mean of its divisors is an integer number (55141547300).

Almost surely, 2^{1020400243524} is an apocalyptic number.

It is an amenable number.

1020400243524 is an abundant number, since it is smaller than the sum of its proper divisors (1626394026876).

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

1020400243524 is a wasteful number, since it uses less digits than its factorization.

1020400243524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686289 (or 4686281 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 1020400243524 its reverse (4253420040201), we get a palindrome (5273820283725).

The spelling of 1020400243524 in words is "one trillion, twenty billion, four hundred million, two hundred forty-three thousand, five hundred twenty-four".