81451950707 has 8 divisors (see below), whose sum is σ = 81669001680. Its totient is φ = 81235012320.

The previous prime is 81451950677. The next prime is 81451950709. The reversal of 81451950707 is 70705915418.

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

It is a cyclic number.

It is not a de Polignac number, because 81451950707 - 2¹⁴ = 81451934323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81451950709) 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, 1535408 + ... + 1587570.

It is an arithmetic number, because the mean of its divisors is an integer number (10208625210).

Almost surely, 2^81451950707 is an apocalyptic number.

81451950707 is a deficient number, since it is larger than the sum of its proper divisors (217050973).

81451950707 is a wasteful number, since it uses less digits than its factorization.

81451950707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56293.

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 81451950707 in words is "eighty-one billion, four hundred fifty-one million, nine hundred fifty thousand, seven hundred seven".