155013057779776 has 63 divisors (see below), whose sum is σ = 357826713167469. Its totient is φ = 66433868809728.

The previous prime is 155013057779729. The next prime is 155013057779777. The reversal of 155013057779776 is 677977750310551.

The square root of 155013057779776 is 12450424.

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., 63527658739776 + 91485399040000 = 7970424^2 + 9564800^2 .

It is a super-2 number, since 2×155013057779776² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155013057779777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 697112580 + ... + 697334908.

Almost surely, 2^{155013057779776} is an apocalyptic number.

155013057779776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

155013057779776 is the 12450424-th square number.

It is an amenable number.

155013057779776 is an abundant number, since it is smaller than the sum of its proper divisors (202813655387693).

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

155013057779776 is an frugal number, since it uses more digits than its factorization.

155013057779776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444684 (or 222338 counting only the distinct ones).

The product of its (nonzero) digits is 340341750, while the sum is 70.

The spelling of 155013057779776 in words is "one hundred fifty-five trillion, thirteen billion, fifty-seven million, seven hundred seventy-nine thousand, seven hundred seventy-six".