71780078151 has 16 divisors (see below), whose sum is σ = 106367269120. Its totient is φ = 47841499800.

The previous prime is 71780078137. The next prime is 71780078171. The reversal of 71780078151 is 15187008717.

It is not a de Polignac number, because 71780078151 - 2⁵ = 71780078119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71780078097 and 71780078106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71780078101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218755 + ... + 437508.

It is an arithmetic number, because the mean of its divisors is an integer number (6647954320).

Almost surely, 2^71780078151 is an apocalyptic number.

71780078151 is a deficient number, since it is larger than the sum of its proper divisors (34587190969).

71780078151 is a wasteful number, since it uses less digits than its factorization.

71780078151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660323 (or 660317 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 45.

The spelling of 71780078151 in words is "seventy-one billion, seven hundred eighty million, seventy-eight thousand, one hundred fifty-one".