53970501691 has 4 divisors (see below), whose sum is σ = 54327922384. Its totient is φ = 53613081000.

The previous prime is 53970501677. The next prime is 53970501713. The reversal of 53970501691 is 19610507935.

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

It is a cyclic number.

It is not a de Polignac number, because 53970501691 - 2²³ = 53962113083 is a prime.

It is a super-3 number, since 3×53970501691³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53970501191) 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, 178710120 + ... + 178710421.

It is an arithmetic number, because the mean of its divisors is an integer number (13581980596).

Almost surely, 2^53970501691 is an apocalyptic number.

53970501691 is a deficient number, since it is larger than the sum of its proper divisors (357420693).

53970501691 is a wasteful number, since it uses less digits than its factorization.

53970501691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357420692.

The product of its (nonzero) digits is 255150, while the sum is 46.

The spelling of 53970501691 in words is "fifty-three billion, nine hundred seventy million, five hundred one thousand, six hundred ninety-one".