1551655332312 has 64 divisors (see below), whose sum is σ = 3957043104000. Its totient is φ = 506854418304.

The previous prime is 1551655332301. The next prime is 1551655332313. The reversal of 1551655332312 is 2132335561551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551655332313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340239 + ... + 1794177.

It is an arithmetic number, because the mean of its divisors is an integer number (61828798500).

Almost surely, 2^{1551655332312} is an apocalyptic number.

1551655332312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551655332312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978521552000).

1551655332312 is an abundant number, since it is smaller than the sum of its proper divisors (2405387771688).

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

1551655332312 is a wasteful number, since it uses less digits than its factorization.

1551655332312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454840 (or 1454836 counting only the distinct ones).

The product of its digits is 405000, while the sum is 42.

The spelling of 1551655332312 in words is "one trillion, five hundred fifty-one billion, six hundred fifty-five million, three hundred thirty-two thousand, three hundred twelve".