78285605497 has 32 divisors (see below), whose sum is σ = 86894593920. Its totient is φ = 69939072000.

The previous prime is 78285605477. The next prime is 78285605509. The reversal of 78285605497 is 79450658287.

It is a cyclic number.

It is not a de Polignac number, because 78285605497 - 2²³ = 78277216889 is a prime.

It is a super-2 number, since 2×78285605497² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78285605477) 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 31 ways as a sum of consecutive naturals, for example, 110416579 + ... + 110417287.

It is an arithmetic number, because the mean of its divisors is an integer number (2715456060).

Almost surely, 2^78285605497 is an apocalyptic number.

It is an amenable number.

78285605497 is a deficient number, since it is larger than the sum of its proper divisors (8608988423).

78285605497 is a wasteful number, since it uses less digits than its factorization.

78285605497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 78285605497 in words is "seventy-eight billion, two hundred eighty-five million, six hundred five thousand, four hundred ninety-seven".