1550801385455 has 32 divisors (see below), whose sum is σ = 2172389690880. Its totient is φ = 1040777297280.

The previous prime is 1550801385421. The next prime is 1550801385559. The reversal of 1550801385455 is 5545831080551.

It is a happy number.

It is not a de Polignac number, because 1550801385455 - 2²⁴ = 1550784608239 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, 1185416 + ... + 2122925.

It is an arithmetic number, because the mean of its divisors is an integer number (67887177840).

Almost surely, 2^{1550801385455} is an apocalyptic number.

1550801385455 is a deficient number, since it is larger than the sum of its proper divisors (621588305425).

1550801385455 is a wasteful number, since it uses less digits than its factorization.

1550801385455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308639.

The product of its (nonzero) digits is 2400000, while the sum is 50.

The spelling of 1550801385455 in words is "one trillion, five hundred fifty billion, eight hundred one million, three hundred eighty-five thousand, four hundred fifty-five".