61001500057 has 4 divisors (see below), whose sum is σ = 61686910260. Its totient is φ = 60316089856.

The previous prime is 61001500031. The next prime is 61001500069. The reversal of 61001500057 is 75000510016.

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 37768424281 + 23233075776 = 194341^2 + 152424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61001500057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61001506057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342704968 + ... + 342705145.

It is an arithmetic number, because the mean of its divisors is an integer number (15421727565).

Almost surely, 2^61001500057 is an apocalyptic number.

It is an amenable number.

61001500057 is a deficient number, since it is larger than the sum of its proper divisors (685410203).

61001500057 is an equidigital number, since it uses as much as digits as its factorization.

61001500057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685410202.

The product of its (nonzero) digits is 1050, while the sum is 25.

The spelling of 61001500057 in words is "sixty-one billion, one million, five hundred thousand, fifty-seven".