73245251557 has 4 divisors (see below), whose sum is σ = 74172406720. Its totient is φ = 72318096396.

The previous prime is 73245251539. The next prime is 73245251633. The reversal of 73245251557 is 75515254237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73245251557 - 2¹⁵ = 73245218789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73245251507) 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, 463577463 + ... + 463577620.

It is an arithmetic number, because the mean of its divisors is an integer number (18543101680).

Almost surely, 2^73245251557 is an apocalyptic number.

It is an amenable number.

73245251557 is a deficient number, since it is larger than the sum of its proper divisors (927155163).

73245251557 is an equidigital number, since it uses as much as digits as its factorization.

73245251557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927155162.

The product of its digits is 1470000, while the sum is 46.

The spelling of 73245251557 in words is "seventy-three billion, two hundred forty-five million, two hundred fifty-one thousand, five hundred fifty-seven".