1551515616012 has 12 divisors (see below), whose sum is σ = 3620203104056. Its totient is φ = 517171872000.

The previous prime is 1551515615981. The next prime is 1551515616073. The reversal of 1551515616012 is 2106165151551.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64646483989 + ... + 64646484012.

Almost surely, 2^{1551515616012} is an apocalyptic number.

1551515616012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1551515616012 is an abundant number, since it is smaller than the sum of its proper divisors (2068687488044).

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

1551515616012 is a wasteful number, since it uses less digits than its factorization.

1551515616012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129292968008 (or 129292968006 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 39.

The spelling of 1551515616012 in words is "one trillion, five hundred fifty-one billion, five hundred fifteen million, six hundred sixteen thousand, twelve".