71072978051 has 8 divisors (see below), whose sum is σ = 71153685504. Its totient is φ = 70992309960.

The previous prime is 71072977999. The next prime is 71072978057. The reversal of 71072978051 is 15087927017.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71072978051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71072977987 and 71072978005.

It is not an unprimeable number, because it can be changed into a prime (71072978057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4917806 + ... + 4932236.

It is an arithmetic number, because the mean of its divisors is an integer number (8894210688).

Almost surely, 2^71072978051 is an apocalyptic number.

71072978051 is a deficient number, since it is larger than the sum of its proper divisors (80707453).

71072978051 is a wasteful number, since it uses less digits than its factorization.

71072978051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681.

The product of its (nonzero) digits is 246960, while the sum is 47.

The spelling of 71072978051 in words is "seventy-one billion, seventy-two million, nine hundred seventy-eight thousand, fifty-one".