155631563077 has 8 divisors (see below), whose sum is σ = 165150665280. Its totient is φ = 146341836960.

The previous prime is 155631563011. The next prime is 155631563141. The reversal of 155631563077 is 770365136551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155631563077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155631563077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155631563777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57342624 + ... + 57345337.

It is an arithmetic number, because the mean of its divisors is an integer number (20643833160).

Almost surely, 2^155631563077 is an apocalyptic number.

It is an amenable number.

155631563077 is a deficient number, since it is larger than the sum of its proper divisors (9519102203).

155631563077 is a wasteful number, since it uses less digits than its factorization.

155631563077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114688043.

The product of its (nonzero) digits is 1984500, while the sum is 49.

The spelling of 155631563077 in words is "one hundred fifty-five billion, six hundred thirty-one million, five hundred sixty-three thousand, seventy-seven".