51151001616550 has 144 divisors (see below), whose sum is σ = 111106263275280. Its totient is φ = 17473592505600.

The previous prime is 51151001616497. The next prime is 51151001616551. The reversal of 51151001616550 is 5561610015115.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51151001616551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2551897 + ... + 10431403.

It is an arithmetic number, because the mean of its divisors is an integer number (771571272745).

Almost surely, 2^{51151001616550} is an apocalyptic number.

51151001616550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51151001616550 is an abundant number, since it is smaller than the sum of its proper divisors (59955261658730).

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

51151001616550 is a wasteful number, since it uses less digits than its factorization.

51151001616550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879607 (or 7879591 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 51151001616550 in words is "fifty-one trillion, one hundred fifty-one billion, one million, six hundred sixteen thousand, five hundred fifty".