77253377985 has 24 divisors (see below), whose sum is σ = 153035263680. Its totient is φ = 35315829792.

The previous prime is 77253377963. The next prime is 77253378049. The reversal of 77253377985 is 58977335277.

77253377985 is a `hidden beast` number, since 7 + 7 + 2 + 533 + 7 + 7 + 98 + 5 = 666.

It is not a de Polignac number, because 77253377985 - 2¹⁵ = 77253345217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122624095 + ... + 122624724.

It is an arithmetic number, because the mean of its divisors is an integer number (6376469320).

Almost surely, 2^77253377985 is an apocalyptic number.

It is an amenable number.

77253377985 is a deficient number, since it is larger than the sum of its proper divisors (75781885695).

77253377985 is a wasteful number, since it uses less digits than its factorization.

77253377985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245248837 (or 245248834 counting only the distinct ones).

The product of its digits is 77792400, while the sum is 63.

The spelling of 77253377985 in words is "seventy-seven billion, two hundred fifty-three million, three hundred seventy-seven thousand, nine hundred eighty-five".