53975878781 has 16 divisors (see below), whose sum is σ = 62362742400. Its totient is φ = 46170516480.

The previous prime is 53975878769. The next prime is 53975878793. The reversal of 53975878781 is 18787857935.

53975878781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53975878769) and next prime (53975878793).

It is a de Polignac number, because none of the positive numbers 2^k-53975878781 is a prime.

It is a super-2 number, since 2×53975878781² (a number of 22 digits) contains 22 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 (53975878081) 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, 721520 + ... + 792806.

It is an arithmetic number, because the mean of its divisors is an integer number (3897671400).

Almost surely, 2^53975878781 is an apocalyptic number.

It is an amenable number.

53975878781 is a deficient number, since it is larger than the sum of its proper divisors (8386863619).

53975878781 is a wasteful number, since it uses less digits than its factorization.

53975878781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75364.

The product of its digits is 118540800, while the sum is 68.

The spelling of 53975878781 in words is "fifty-three billion, nine hundred seventy-five million, eight hundred seventy-eight thousand, seven hundred eighty-one".