155421501254755 has 16 divisors (see below), whose sum is σ = 186606112702464. Its totient is φ = 124270341924960.

The previous prime is 155421501254711. The next prime is 155421501254837. The reversal of 155421501254755 is 557452105124551.

It is not a de Polignac number, because 155421501254755 - 2¹¹ = 155421501252707 is a prime.

It is a super-2 number, since 2×155421501254755² (a number of 29 digits) contains 22 as substring.

It is a Duffinian 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, 82060374 + ... + 83932996.

It is an arithmetic number, because the mean of its divisors is an integer number (11662882043904).

Almost surely, 2^{155421501254755} is an apocalyptic number.

155421501254755 is a deficient number, since it is larger than the sum of its proper divisors (31184611447709).

155421501254755 is a wasteful number, since it uses less digits than its factorization.

155421501254755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881546.

The product of its (nonzero) digits is 7000000, while the sum is 52.

The spelling of 155421501254755 in words is "one hundred fifty-five trillion, four hundred twenty-one billion, five hundred one million, two hundred fifty-four thousand, seven hundred fifty-five".