61241621053511 has 4 divisors (see below), whose sum is σ = 61647194703024. Its totient is φ = 60836047404000.

The previous prime is 61241621053507. The next prime is 61241621053531. The reversal of 61241621053511 is 11535012614216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61241621053511 - 2² = 61241621053507 is a prime.

It is a super-2 number, since 2×61241621053511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61241621053531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202786824530 + ... + 202786824831.

It is an arithmetic number, because the mean of its divisors is an integer number (15411798675756).

Almost surely, 2^{61241621053511} is an apocalyptic number.

61241621053511 is a deficient number, since it is larger than the sum of its proper divisors (405573649513).

61241621053511 is a wasteful number, since it uses less digits than its factorization.

61241621053511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405573649512.

The product of its (nonzero) digits is 43200, while the sum is 38.

Adding to 61241621053511 its reverse (11535012614216), we get a palindrome (72776633667727).

The spelling of 61241621053511 in words is "sixty-one trillion, two hundred forty-one billion, six hundred twenty-one million, fifty-three thousand, five hundred eleven".