51245408541 has 16 divisors (see below), whose sum is σ = 70037489984. Its totient is φ = 33311222784.

The previous prime is 51245408509. The next prime is 51245408569. The reversal of 51245408541 is 14580454215.

It is a happy number.

It is not a de Polignac number, because 51245408541 - 2⁵ = 51245408509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51245408541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245408581) 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, 269806 + ... + 418671.

It is an arithmetic number, because the mean of its divisors is an integer number (4377343124).

Almost surely, 2^51245408541 is an apocalyptic number.

It is an amenable number.

51245408541 is a deficient number, since it is larger than the sum of its proper divisors (18792081443).

51245408541 is a wasteful number, since it uses less digits than its factorization.

51245408541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689100.

The product of its (nonzero) digits is 128000, while the sum is 39.

The spelling of 51245408541 in words is "fifty-one billion, two hundred forty-five million, four hundred eight thousand, five hundred forty-one".