61457493523 has 2 divisors, whose sum is σ = 61457493524. Its totient is φ = 61457493522.

The previous prime is 61457493463. The next prime is 61457493623. The reversal of 61457493523 is 32539475416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61457493523 - 2⁹ = 61457493011 is a prime.

It is not a weakly prime, because it can be changed into another prime (61457493323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728746761 + 30728746762.

It is an arithmetic number, because the mean of its divisors is an integer number (30728746762).

Almost surely, 2^61457493523 is an apocalyptic number.

61457493523 is a deficient number, since it is larger than the sum of its proper divisors (1).

61457493523 is an equidigital number, since it uses as much as digits as its factorization.

61457493523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 49.

The spelling of 61457493523 in words is "sixty-one billion, four hundred fifty-seven million, four hundred ninety-three thousand, five hundred twenty-three".