53770371691 has 4 divisors (see below), whose sum is σ = 53776115352. Its totient is φ = 53764628032.

The previous prime is 53770371673. The next prime is 53770371763. The reversal of 53770371691 is 19617307735.

53770371691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-53770371691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53770371601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2857765 + ... + 2876518.

It is an arithmetic number, because the mean of its divisors is an integer number (13444028838).

Almost surely, 2^53770371691 is an apocalyptic number.

53770371691 is a deficient number, since it is larger than the sum of its proper divisors (5743661).

53770371691 is an equidigital number, since it uses as much as digits as its factorization.

53770371691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743660.

The product of its (nonzero) digits is 833490, while the sum is 49.

The spelling of 53770371691 in words is "fifty-three billion, seven hundred seventy million, three hundred seventy-one thousand, six hundred ninety-one".