51262047690 has 256 divisors, whose sum is σ = 157867315200. Its totient is φ = 10370322432.

The previous prime is 51262047667. The next prime is 51262047721. The reversal of 51262047690 is 9674026215.

It is a super-2 number, since 2×51262047690² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9425652 + ... + 9431088.

It is an arithmetic number, because the mean of its divisors is an integer number (616669200).

Almost surely, 2^51262047690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51262047690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78933657600).

51262047690 is an abundant number, since it is smaller than the sum of its proper divisors (106605267510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51262047690 is a wasteful number, since it uses less digits than its factorization.

51262047690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 51262047690 in words is "fifty-one billion, two hundred sixty-two million, forty-seven thousand, six hundred ninety".