61307972333 has 4 divisors (see below), whose sum is σ = 61311276348. Its totient is φ = 61304668320.

The previous prime is 61307972309. The next prime is 61307972351. The reversal of 61307972333 is 33327970316.

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 7485364324 + 53822608009 = 86518^2 + 231997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61307972333 is a prime.

It is a super-3 number, since 3×61307972333³ (a number of 33 digits) contains 333 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 (61307972303) 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, 1624016 + ... + 1661337.

It is an arithmetic number, because the mean of its divisors is an integer number (15327819087).

Almost surely, 2^61307972333 is an apocalyptic number.

It is an amenable number.

61307972333 is a deficient number, since it is larger than the sum of its proper divisors (3304015).

61307972333 is a wasteful number, since it uses less digits than its factorization.

61307972333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304014.

The product of its (nonzero) digits is 428652, while the sum is 44.

The spelling of 61307972333 in words is "sixty-one billion, three hundred seven million, nine hundred seventy-two thousand, three hundred thirty-three".