78262950845 has 8 divisors (see below), whose sum is σ = 94156971480. Its totient is φ = 62449407040.

The previous prime is 78262950817. The next prime is 78262950851. The reversal of 78262950845 is 54805926287.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8462896036 + 69800054809 = 91994^2 + 264197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78262950845 - 2³² = 73967983549 is a prime.

It is a super-2 number, since 2×78262950845² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20117066 + ... + 20120955.

It is an arithmetic number, because the mean of its divisors is an integer number (11769621435).

Almost surely, 2^78262950845 is an apocalyptic number.

It is an amenable number.

78262950845 is a deficient number, since it is larger than the sum of its proper divisors (15894020635).

78262950845 is a wasteful number, since it uses less digits than its factorization.

78262950845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40238415.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 78262950845 in words is "seventy-eight billion, two hundred sixty-two million, nine hundred fifty thousand, eight hundred forty-five".