155878420841 has 32 divisors (see below), whose sum is σ = 199142955648. Its totient is φ = 119785098240.

The previous prime is 155878420837. The next prime is 155878420843. The reversal of 155878420841 is 148024878551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 155878420841 - 2² = 155878420837 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155878420843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776555 + ... + 956448.

It is an arithmetic number, because the mean of its divisors is an integer number (6223217364).

Almost surely, 2^155878420841 is an apocalyptic number.

155878420841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155878420841 is a deficient number, since it is larger than the sum of its proper divisors (43264534807).

155878420841 is a wasteful number, since it uses less digits than its factorization.

155878420841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733081.

The product of its (nonzero) digits is 2867200, while the sum is 53.

The spelling of 155878420841 in words is "one hundred fifty-five billion, eight hundred seventy-eight million, four hundred twenty thousand, eight hundred forty-one".