155735993956 has 45 divisors (see below), whose sum is σ = 285691960281. Its totient is φ = 74282747088.

The previous prime is 155735993951. The next prime is 155735993969. The reversal of 155735993956 is 659399537551.

The square root of 155735993956 is 394634.

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

It can be written as a sum of positive squares in only one way, i.e., 84651902500 + 71084091456 = 290950^2 + 266616^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155735993891 and 155735993900.

It is not an unprimeable number, because it can be changed into a prime (155735993951) 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, 417522586 + ... + 417522958.

Almost surely, 2^155735993956 is an apocalyptic number.

155735993956 is the 394634-th square number.

It is an amenable number.

155735993956 is a deficient number, since it is larger than the sum of its proper divisors (129955966325).

155735993956 is an frugal number, since it uses more digits than its factorization.

155735993956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 398 counting only the distinct ones).

The product of its digits is 172226250, while the sum is 67.

The spelling of 155735993956 in words is "one hundred fifty-five billion, seven hundred thirty-five million, nine hundred ninety-three thousand, nine hundred fifty-six".