1551015051516 has 96 divisors (see below), whose sum is σ = 4600051258880. Its totient is φ = 442717944192.

The previous prime is 1551015051463. The next prime is 1551015051557. The reversal of 1551015051516 is 6151505101551.

1551015051516 is a `hidden beast` number, since 1 + 551 + 0 + 1 + 5 + 0 + 51 + 51 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212086 + ... + 1773981.

Almost surely, 2^{1551015051516} 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 1551015051516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2300025629440).

1551015051516 is an abundant number, since it is smaller than the sum of its proper divisors (3049036207364).

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

1551015051516 is a wasteful number, since it uses less digits than its factorization.

1551015051516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987120 (or 1987112 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 1551015051516 in words is "one trillion, five hundred fifty-one billion, fifteen million, fifty-one thousand, five hundred sixteen".