71452420951 has 4 divisors (see below), whose sum is σ = 72431221312. Its totient is φ = 70473620592.

The previous prime is 71452420939. The next prime is 71452420973. The reversal of 71452420951 is 15902425417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71452420951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71452420451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489400071 + ... + 489400216.

It is an arithmetic number, because the mean of its divisors is an integer number (18107805328).

Almost surely, 2^71452420951 is an apocalyptic number.

71452420951 is a deficient number, since it is larger than the sum of its proper divisors (978800361).

71452420951 is an equidigital number, since it uses as much as digits as its factorization.

71452420951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978800360.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 71452420951 in words is "seventy-one billion, four hundred fifty-two million, four hundred twenty thousand, nine hundred fifty-one".