61301226545501 has 4 divisors (see below), whose sum is σ = 61303814319900. Its totient is φ = 61298638771104.

The previous prime is 61301226545497. The next prime is 61301226545521. The reversal of 61301226545501 is 10554562210316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1342516168900 + 59958710376601 = 1158670^2 + 7743301^2 .

It is a cyclic number.

It is not a de Polignac number, because 61301226545501 - 2² = 61301226545497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61301226545521) 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, 1293851666 + ... + 1293899043.

It is an arithmetic number, because the mean of its divisors is an integer number (15325953579975).

Almost surely, 2^{61301226545501} is an apocalyptic number.

It is an amenable number.

61301226545501 is a deficient number, since it is larger than the sum of its proper divisors (2587774399).

61301226545501 is a wasteful number, since it uses less digits than its factorization.

61301226545501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587774398.

The product of its (nonzero) digits is 216000, while the sum is 41.

Adding to 61301226545501 its reverse (10554562210316), we get a palindrome (71855788755817).

The spelling of 61301226545501 in words is "sixty-one trillion, three hundred one billion, two hundred twenty-six million, five hundred forty-five thousand, five hundred one".