155742121376 has 48 divisors (see below), whose sum is σ = 312540011784. Its totient is φ = 76368175104.

The previous prime is 155742121373. The next prime is 155742121433. The reversal of 155742121376 is 673121247551.

It can be written as a sum of positive squares in 4 ways, for example, as 142941461776 + 12800659600 = 378076^2 + 113140^2 .

It is a super-2 number, since 2×155742121376² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155742121373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4080236 + ... + 4118228.

Almost surely, 2^155742121376 is an apocalyptic number.

155742121376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155742121376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156270005892).

155742121376 is an abundant number, since it is smaller than the sum of its proper divisors (156797890408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155742121376 is a wasteful number, since it uses less digits than its factorization.

155742121376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473 (or 40465 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The spelling of 155742121376 in words is "one hundred fifty-five billion, seven hundred forty-two million, one hundred twenty-one thousand, three hundred seventy-six".