61545662136029 has 4 divisors (see below), whose sum is σ = 62855144309184. Its totient is φ = 60236179962876.

The previous prime is 61545662135933. The next prime is 61545662136067. The reversal of 61545662136029 is 92063126654516.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61545662136029 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 (61545662132029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654741086507 + ... + 654741086600.

It is an arithmetic number, because the mean of its divisors is an integer number (15713786077296).

Almost surely, 2^{61545662136029} is an apocalyptic number.

It is an amenable number.

61545662136029 is a deficient number, since it is larger than the sum of its proper divisors (1309482173155).

61545662136029 is a wasteful number, since it uses less digits than its factorization.

61545662136029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309482173154.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 61545662136029 in words is "sixty-one trillion, five hundred forty-five billion, six hundred sixty-two million, one hundred thirty-six thousand, twenty-nine".