61266612500 has 36 divisors (see below), whose sum is σ = 134012164860. Its totient is φ = 24506640000.

The previous prime is 61266612427. The next prime is 61266612527. The reversal of 61266612500 is 521666216.

It can be written as a sum of positive squares in 6 ways, for example, as 43245697936 + 18020914564 = 207956^2 + 134242^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2438165 + ... + 2463164.

It is an arithmetic number, because the mean of its divisors is an integer number (3722560135).

Almost surely, 2^61266612500 is an apocalyptic number.

It is an amenable number.

61266612500 is an abundant number, since it is smaller than the sum of its proper divisors (72745552360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61266612500 is an equidigital number, since it uses as much as digits as its factorization.

61266612500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901358 (or 4901336 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 61266612500 in words is "sixty-one billion, two hundred sixty-six million, six hundred twelve thousand, five hundred".