61201515103 has 4 divisors (see below), whose sum is σ = 61342858528. Its totient is φ = 61060171680.

The previous prime is 61201515071. The next prime is 61201515127. The reversal of 61201515103 is 30151510216.

It is a happy number.

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 61201515103 - 2⁵ = 61201515071 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 (61201515503) 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, 70671063 + ... + 70671928.

It is an arithmetic number, because the mean of its divisors is an integer number (15335714632).

Almost surely, 2^61201515103 is an apocalyptic number.

61201515103 is a deficient number, since it is larger than the sum of its proper divisors (141343425).

61201515103 is a wasteful number, since it uses less digits than its factorization.

61201515103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141343424.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 61201515103 in words is "sixty-one billion, two hundred one million, five hundred fifteen thousand, one hundred three".