61051550501 has 4 divisors (see below), whose sum is σ = 61246603692. Its totient is φ = 60856497312.

The previous prime is 61051550479. The next prime is 61051550513. The reversal of 61051550501 is 10505515016.

It is a happy number.

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 32698042276 + 28353508225 = 180826^2 + 168385^2 .

It is a cyclic number.

It is not a de Polignac number, because 61051550501 - 2²² = 61047356197 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 (61051555501) 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, 97526126 + ... + 97526751.

It is an arithmetic number, because the mean of its divisors is an integer number (15311650923).

Almost surely, 2^61051550501 is an apocalyptic number.

It is an amenable number.

61051550501 is a deficient number, since it is larger than the sum of its proper divisors (195053191).

61051550501 is a wasteful number, since it uses less digits than its factorization.

61051550501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195053190.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 61051550501 in words is "sixty-one billion, fifty-one million, five hundred fifty thousand, five hundred one".