77215525087 has 8 divisors (see below), whose sum is σ = 82877583456. Its totient is φ = 71677907712.

The previous prime is 77215525081. The next prime is 77215525109. The reversal of 77215525087 is 78052551277.

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 77215525087 - 2³¹ = 75068041439 is a prime.

It is a super-2 number, since 2×77215525087² (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 77215525087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77215525081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31108963 + ... + 31111444.

It is an arithmetic number, because the mean of its divisors is an integer number (10359697932).

Almost surely, 2^77215525087 is an apocalyptic number.

77215525087 is a deficient number, since it is larger than the sum of its proper divisors (5662058369).

77215525087 is a wasteful number, since it uses less digits than its factorization.

77215525087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62220497.

The product of its (nonzero) digits is 1372000, while the sum is 49.

The spelling of 77215525087 in words is "seventy-seven billion, two hundred fifteen million, five hundred twenty-five thousand, eighty-seven".