61002436129 has 4 divisors (see below), whose sum is σ = 61124686000. Its totient is φ = 60880186260.

The previous prime is 61002436123. The next prime is 61002436141. The reversal of 61002436129 is 92163420016.

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 not a de Polignac number, because 61002436129 - 2³⁵ = 26642697761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61002436094 and 61002436103.

It is not an unprimeable number, because it can be changed into a prime (61002436123) 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, 61124187 + ... + 61125184.

It is an arithmetic number, because the mean of its divisors is an integer number (15281171500).

Almost surely, 2^61002436129 is an apocalyptic number.

It is an amenable number.

61002436129 is a deficient number, since it is larger than the sum of its proper divisors (122249871).

61002436129 is a wasteful number, since it uses less digits than its factorization.

61002436129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122249870.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 61002436129 in words is "sixty-one billion, two million, four hundred thirty-six thousand, one hundred twenty-nine".