51146953936 has 80 divisors (see below), whose sum is σ = 112959159040. Its totient is φ = 22239982080.

The previous prime is 51146953901. The next prime is 51146953937. The reversal of 51146953936 is 63935964115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51146953937) 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, 679561 + ... + 751063.

It is an arithmetic number, because the mean of its divisors is an integer number (1411989488).

Almost surely, 2^51146953936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51146953936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56479579520).

51146953936 is an abundant number, since it is smaller than the sum of its proper divisors (61812205104).

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

51146953936 is a wasteful number, since it uses less digits than its factorization.

51146953936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71724 (or 71718 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 52.

The spelling of 51146953936 in words is "fifty-one billion, one hundred forty-six million, nine hundred fifty-three thousand, nine hundred thirty-six".