51161402070 has 48 divisors (see below), whose sum is σ = 133225391520. Its totient is φ = 13621938432.

The previous prime is 51161402059. The next prime is 51161402077. The reversal of 51161402070 is 7020416115.

It is a happy number.

51161402070 is a `hidden beast` number, since 511 + 6 + 140 + 2 + 0 + 7 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51161402077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381075 + ... + 497534.

It is an arithmetic number, because the mean of its divisors is an integer number (2775528990).

Almost surely, 2^51161402070 is an apocalyptic number.

51161402070 is an abundant number, since it is smaller than the sum of its proper divisors (82063989450).

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

51161402070 is a wasteful number, since it uses less digits than its factorization.

51161402070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879269 (or 879266 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 51161402070 its reverse (7020416115), we get a palindrome (58181818185).

The spelling of 51161402070 in words is "fifty-one billion, one hundred sixty-one million, four hundred two thousand, seventy".