61212557512523 has 8 divisors (see below), whose sum is σ = 61248139748640. Its totient is φ = 61176980732800.

The previous prime is 61212557512517. The next prime is 61212557512531. The reversal of 61212557512523 is 32521575521216.

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 61212557512523 - 2⁴ = 61212557512507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61212557512583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21187673 + ... + 23902773.

It is an arithmetic number, because the mean of its divisors is an integer number (7656017468580).

Almost surely, 2^{61212557512523} is an apocalyptic number.

61212557512523 is a deficient number, since it is larger than the sum of its proper divisors (35582236117).

61212557512523 is a wasteful number, since it uses less digits than its factorization.

61212557512523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728197.

The product of its digits is 1260000, while the sum is 47.

The spelling of 61212557512523 in words is "sixty-one trillion, two hundred twelve billion, five hundred fifty-seven million, five hundred twelve thousand, five hundred twenty-three".