53261026661640 has 256 divisors, whose sum is σ = 194123423232000. Its totient is φ = 11419024204800.

The previous prime is 53261026661639. The next prime is 53261026661641. The reversal of 53261026661640 is 4616662016235.

It is an interprime number because it is at equal distance from previous prime (53261026661639) and next prime (53261026661641).

It is a super-2 number, since 2×53261026661640² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53261026661640.

It is not an unprimeable number, because it can be changed into a prime (53261026661641) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 14908620 + ... + 18132539.

It is an arithmetic number, because the mean of its divisors is an integer number (758294622000).

Almost surely, 2^{53261026661640} is an apocalyptic number.

It is an amenable number.

53261026661640 is an abundant number, since it is smaller than the sum of its proper divisors (140862396570360).

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

53261026661640 is a wasteful number, since it uses less digits than its factorization.

53261026661640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33041300 (or 33041296 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

Adding to 53261026661640 its reverse (4616662016235), we get a palindrome (57877688677875).

The spelling of 53261026661640 in words is "fifty-three trillion, two hundred sixty-one billion, twenty-six million, six hundred sixty-one thousand, six hundred forty".