70820144457 has 8 divisors (see below), whose sum is σ = 95116106976. Its totient is φ = 46868805792.

The previous prime is 70820144441. The next prime is 70820144489. The reversal of 70820144457 is 75444102807.

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

It is not a de Polignac number, because 70820144457 - 2⁴ = 70820144441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70820144497) 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, 86155483 + ... + 86156304.

It is an arithmetic number, because the mean of its divisors is an integer number (11889513372).

Almost surely, 2^70820144457 is an apocalyptic number.

It is an amenable number.

70820144457 is a deficient number, since it is larger than the sum of its proper divisors (24295962519).

70820144457 is a wasteful number, since it uses less digits than its factorization.

70820144457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172311927.

The product of its (nonzero) digits is 250880, while the sum is 42.

The spelling of 70820144457 in words is "seventy billion, eight hundred twenty million, one hundred forty-four thousand, four hundred fifty-seven".