155898139538990 has 16 divisors (see below), whose sum is σ = 280616794385760. Its totient is φ = 62359223989920.

The previous prime is 155898139538969. The next prime is 155898139539007. The reversal of 155898139538990 is 99835931898551.

It is a junction number, because it is equal to n+sod(n) for n = 155898139538899 and 155898139538908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32688431 + ... + 37152789.

It is an arithmetic number, because the mean of its divisors is an integer number (17538549649110).

Almost surely, 2^{155898139538990} is an apocalyptic number.

155898139538990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155898139538990 is a deficient number, since it is larger than the sum of its proper divisors (124718654846770).

155898139538990 is a wasteful number, since it uses less digits than its factorization.

155898139538990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956427.

The product of its (nonzero) digits is 3779136000, while the sum is 83.

The spelling of 155898139538990 in words is "one hundred fifty-five trillion, eight hundred ninety-eight billion, one hundred thirty-nine million, five hundred thirty-eight thousand, nine hundred ninety".