51516601501 has 4 divisors (see below), whose sum is σ = 54228001600. Its totient is φ = 48805201404.

The previous prime is 51516601489. The next prime is 51516601517. The reversal of 51516601501 is 10510661515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51516601501 - 2⁵ = 51516601469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516601531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355700021 + ... + 1355700058.

It is an arithmetic number, because the mean of its divisors is an integer number (13557000400).

Almost surely, 2^51516601501 is an apocalyptic number.

It is an amenable number.

51516601501 is a deficient number, since it is larger than the sum of its proper divisors (2711400099).

51516601501 is a wasteful number, since it uses less digits than its factorization.

51516601501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711400098.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 51516601501 in words is "fifty-one billion, five hundred sixteen million, six hundred one thousand, five hundred one".