1551151151655 has 32 divisors (see below), whose sum is σ = 2836656081408. Its totient is φ = 709031318400.

The previous prime is 1551151151639. The next prime is 1551151151687. The reversal of 1551151151655 is 5561511511551.

It is a happy number.

It is not a de Polignac number, because 1551151151655 - 2⁴ = 1551151151639 is a prime.

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, 445185 + ... + 1816725.

It is an arithmetic number, because the mean of its divisors is an integer number (88645502544).

Almost surely, 2^{1551151151655} is an apocalyptic number.

1551151151655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551151151655 is a deficient number, since it is larger than the sum of its proper divisors (1285504929753).

1551151151655 is a wasteful number, since it uses less digits than its factorization.

1551151151655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382327.

The product of its digits is 93750, while the sum is 42.

The spelling of 1551151151655 in words is "one trillion, five hundred fifty-one billion, one hundred fifty-one million, one hundred fifty-one thousand, six hundred fifty-five".