1551253642656 has 48 divisors (see below), whose sum is σ = 4096424332224. Its totient is φ = 513988227584.

The previous prime is 1551253642571. The next prime is 1551253642667. The reversal of 1551253642656 is 6562463521551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1551253642599 and 1551253642608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48363885 + ... + 48395948.

It is an arithmetic number, because the mean of its divisors is an integer number (85342173588).

Almost surely, 2^{1551253642656} is an apocalyptic number.

1551253642656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1551253642656 is an abundant number, since it is smaller than the sum of its proper divisors (2545170689568).

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

1551253642656 is a wasteful number, since it uses less digits than its factorization.

1551253642656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96760013 (or 96760005 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 51.

The spelling of 1551253642656 in words is "one trillion, five hundred fifty-one billion, two hundred fifty-three million, six hundred forty-two thousand, six hundred fifty-six".