51969619261 has 32 divisors (see below), whose sum is σ = 64625745920. Its totient is φ = 40783176000.

The previous prime is 51969619241. The next prime is 51969619279. The reversal of 51969619261 is 16291696915.

It is a happy number.

51969619261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51969619261 - 2⁷ = 51969619133 is a prime.

It is a super-2 number, since 2×51969619261² (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 (51969619241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3112786 + ... + 3129436.

It is an arithmetic number, because the mean of its divisors is an integer number (2019554560).

Almost surely, 2^51969619261 is an apocalyptic number.

It is an amenable number.

51969619261 is a deficient number, since it is larger than the sum of its proper divisors (12656126659).

51969619261 is a wasteful number, since it uses less digits than its factorization.

51969619261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17465.

The product of its digits is 1574640, while the sum is 55.

The spelling of 51969619261 in words is "fifty-one billion, nine hundred sixty-nine million, six hundred nineteen thousand, two hundred sixty-one".