61207688501 has 4 divisors (see below), whose sum is σ = 61208279052. Its totient is φ = 61207097952.

The previous prime is 61207688497. The next prime is 61207688519. The reversal of 61207688501 is 10588670216.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 41391495601 + 19816192900 = 203449^2 + 140770^2 .

It is a cyclic number.

It is not a de Polignac number, because 61207688501 - 2² = 61207688497 is a prime.

It is a super-2 number, since 2×61207688501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61207685501) 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, 94136 + ... + 362321.

It is an arithmetic number, because the mean of its divisors is an integer number (15302069763).

Almost surely, 2^61207688501 is an apocalyptic number.

It is an amenable number.

61207688501 is a deficient number, since it is larger than the sum of its proper divisors (590551).

61207688501 is a wasteful number, since it uses less digits than its factorization.

61207688501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590550.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 61207688501 in words is "sixty-one billion, two hundred seven million, six hundred eighty-eight thousand, five hundred one".