1551555042415 has 16 divisors (see below), whose sum is σ = 2177331729408. Its totient is φ = 1039181050656.

The previous prime is 1551555042409. The next prime is 1551555042421. The reversal of 1551555042415 is 5142405551551.

It is an interprime number because it is at equal distance from previous prime (1551555042409) and next prime (1551555042421).

It is not a de Polignac number, because 1551555042415 - 2¹⁷ = 1551554911343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515465287 + ... + 515468296.

It is an arithmetic number, because the mean of its divisors is an integer number (136083233088).

Almost surely, 2^{1551555042415} is an apocalyptic number.

1551555042415 is a deficient number, since it is larger than the sum of its proper divisors (625776686993).

1551555042415 is a wasteful number, since it uses less digits than its factorization.

1551555042415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030933638.

The product of its (nonzero) digits is 500000, while the sum is 43.

The spelling of 1551555042415 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-five million, forty-two thousand, four hundred fifteen".