155661331270 has 8 divisors (see below), whose sum is σ = 280190396304. Its totient is φ = 62264532504.

The previous prime is 155661331207. The next prime is 155661331349. The reversal of 155661331270 is 72133166551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7783066554 + ... + 7783066573.

It is an arithmetic number, because the mean of its divisors is an integer number (35023799538).

Almost surely, 2^155661331270 is an apocalyptic number.

155661331270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155661331270 is a deficient number, since it is larger than the sum of its proper divisors (124529065034).

155661331270 is a wasteful number, since it uses less digits than its factorization.

155661331270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15566133134.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 155661331270 in words is "one hundred fifty-five billion, six hundred sixty-one million, three hundred thirty-one thousand, two hundred seventy".