155297973578 has 16 divisors (see below), whose sum is σ = 254131244640. Its totient is φ = 70587963600.

The previous prime is 155297973577. The next prime is 155297973619. The reversal of 155297973578 is 875379792551.

It is a super-2 number, since 2×155297973578² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155297973577) 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, 906128 + ... + 1063796.

It is an arithmetic number, because the mean of its divisors is an integer number (15883202790).

Almost surely, 2^155297973578 is an apocalyptic number.

155297973578 is a deficient number, since it is larger than the sum of its proper divisors (98833271062).

155297973578 is a wasteful number, since it uses less digits than its factorization.

155297973578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202453.

The product of its digits is 166698000, while the sum is 68.

The spelling of 155297973578 in words is "one hundred fifty-five billion, two hundred ninety-seven million, nine hundred seventy-three thousand, five hundred seventy-eight".