11621361505155 has 16 divisors (see below), whose sum is σ = 18608739267744. Its totient is φ = 6193205849600.

The previous prime is 11621361505139. The next prime is 11621361505199. The reversal of 11621361505155 is 55150516312611.

It is a happy number.

It is not a de Polignac number, because 11621361505155 - 2⁴ = 11621361505139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303331446 + ... + 303369755.

It is an arithmetic number, because the mean of its divisors is an integer number (1163046204234).

Almost surely, 2^{11621361505155} is an apocalyptic number.

11621361505155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11621361505155 is a deficient number, since it is larger than the sum of its proper divisors (6987377762589).

11621361505155 is a wasteful number, since it uses less digits than its factorization.

11621361505155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606702486.

The product of its (nonzero) digits is 135000, while the sum is 42.

Adding to 11621361505155 its reverse (55150516312611), we get a palindrome (66771877817766).

The spelling of 11621361505155 in words is "eleven trillion, six hundred twenty-one billion, three hundred sixty-one million, five hundred five thousand, one hundred fifty-five".