78741862545 has 16 divisors (see below), whose sum is σ = 132617874240. Its totient is φ = 39785361984.

The previous prime is 78741862517. The next prime is 78741862559. The reversal of 78741862545 is 54526814787.

It is not a de Polignac number, because 78741862545 - 2⁵ = 78741862513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138143334 + ... + 138143903.

It is an arithmetic number, because the mean of its divisors is an integer number (8288617140).

Almost surely, 2^78741862545 is an apocalyptic number.

It is an amenable number.

78741862545 is a deficient number, since it is larger than the sum of its proper divisors (53876011695).

78741862545 is a wasteful number, since it uses less digits than its factorization.

78741862545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276287264.

The product of its digits is 15052800, while the sum is 57.

The spelling of 78741862545 in words is "seventy-eight billion, seven hundred forty-one million, eight hundred sixty-two thousand, five hundred forty-five".