85720762505 has 32 divisors (see below), whose sum is σ = 123682083840. Its totient is φ = 55796359680.

The previous prime is 85720762499. The next prime is 85720762507. The reversal of 85720762505 is 50526702758.

It is not a de Polignac number, because 85720762505 - 2¹⁴ = 85720746121 is a prime.

It is a super-2 number, since 2×85720762505² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85720762505.

It is not an unprimeable number, because it can be changed into a prime (85720762507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754145 + ... + 860334.

It is an arithmetic number, because the mean of its divisors is an integer number (3865065120).

Almost surely, 2^85720762505 is an apocalyptic number.

It is an amenable number.

85720762505 is a deficient number, since it is larger than the sum of its proper divisors (37961321335).

85720762505 is a wasteful number, since it uses less digits than its factorization.

85720762505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614569.

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 85720762505 in words is "eighty-five billion, seven hundred twenty million, seven hundred sixty-two thousand, five hundred five".