155079729754 has 4 divisors (see below), whose sum is σ = 232619594634. Its totient is φ = 77539864876.

The previous prime is 155079729691. The next prime is 155079729773. The reversal of 155079729754 is 457927970551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 457927970551 = 60521 ⋅7566431.

It can be written as a sum of positive squares in only one way, i.e., 155060325729 + 19404025 = 393777^2 + 4405^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155079729692 and 155079729701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38769932437 + ... + 38769932440.

Almost surely, 2^155079729754 is an apocalyptic number.

155079729754 is a deficient number, since it is larger than the sum of its proper divisors (77539864880).

155079729754 is an equidigital number, since it uses as much as digits as its factorization.

155079729754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77539864879.

The product of its (nonzero) digits is 27783000, while the sum is 61.

The spelling of 155079729754 in words is "one hundred fifty-five billion, seventy-nine million, seven hundred twenty-nine thousand, seven hundred fifty-four".