155919157956 has 45 divisors (see below), whose sum is σ = 407622059229. Its totient is φ = 51970683456.

The previous prime is 155919157951. The next prime is 155919157963. The reversal of 155919157956 is 659751919551.

The square root of 155919157956 is 394866.

It is a perfect power (a square), and thus also a powerful number.

155919157956 is a `hidden beast` number, since 1 + 5 + 5 + 9 + 1 + 9 + 1 + 579 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25176168900 + 130742989056 = 158670^2 + 361584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155919157893 and 155919157902.

It is not an unprimeable number, because it can be changed into a prime (155919157951) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7096620 + ... + 7118556.

Almost surely, 2^155919157956 is an apocalyptic number.

155919157956 is the 394866-th square number.

It is an amenable number.

155919157956 is an abundant number, since it is smaller than the sum of its proper divisors (251702901273).

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

155919157956 is an frugal number, since it uses more digits than its factorization.

155919157956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43890 (or 21942 counting only the distinct ones).

The product of its digits is 19136250, while the sum is 63.

The spelling of 155919157956 in words is "one hundred fifty-five billion, nine hundred nineteen million, one hundred fifty-seven thousand, nine hundred fifty-six".