71051142978 has 32 divisors (see below), whose sum is σ = 159027355200. Its totient is φ = 23513325408.

The previous prime is 71051142973. The next prime is 71051142989. The reversal of 71051142978 is 87924115017.

It is a happy number.

71051142978 is a `hidden beast` number, since 7 + 1 + 0 + 511 + 42 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (71051142973) 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, 4725451 + ... + 4740462.

It is an arithmetic number, because the mean of its divisors is an integer number (4969604850).

Almost surely, 2^71051142978 is an apocalyptic number.

71051142978 is an abundant number, since it is smaller than the sum of its proper divisors (87976212222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71051142978 is a wasteful number, since it uses less digits than its factorization.

71051142978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9466063 (or 9466057 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 71051142978 in words is "seventy-one billion, fifty-one million, one hundred forty-two thousand, nine hundred seventy-eight".