68720905471 has 16 divisors (see below), whose sum is σ = 70759713024. Its totient is φ = 66721630464.

The previous prime is 68720905439. The next prime is 68720905489. The reversal of 68720905471 is 17450902786.

It is a cyclic number.

It is not a de Polignac number, because 68720905471 - 2⁵ = 68720905439 is a prime.

It is a super-3 number, since 3×68720905471³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68720905411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036896 + ... + 1101178.

It is an arithmetic number, because the mean of its divisors is an integer number (4422482064).

Almost surely, 2^68720905471 is an apocalyptic number.

68720905471 is a deficient number, since it is larger than the sum of its proper divisors (2038807553).

68720905471 is a wasteful number, since it uses less digits than its factorization.

68720905471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64590.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 68720905471 in words is "sixty-eight billion, seven hundred twenty million, nine hundred five thousand, four hundred seventy-one".