61520405253635 has 8 divisors (see below), whose sum is σ = 73893545699280. Its totient is φ = 49170284606304.

The previous prime is 61520405253613. The next prime is 61520405253641. The reversal of 61520405253635 is 53635250402516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61520405253635 - 2²⁴ = 61520388476419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61520405253635.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5754943697 + ... + 5754954386.

It is an arithmetic number, because the mean of its divisors is an integer number (9236693212410).

Almost surely, 2^{61520405253635} is an apocalyptic number.

61520405253635 is a deficient number, since it is larger than the sum of its proper divisors (12373140445645).

61520405253635 is a wasteful number, since it uses less digits than its factorization.

61520405253635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11509899157.

The product of its (nonzero) digits is 3240000, while the sum is 47.

The spelling of 61520405253635 in words is "sixty-one trillion, five hundred twenty billion, four hundred five million, two hundred fifty-three thousand, six hundred thirty-five".