155725562551 has 12 divisors (see below), whose sum is σ = 169749428968. Its totient is φ = 142014703824.

The previous prime is 155725562549. The next prime is 155725562557. The reversal of 155725562551 is 155265527551.

155725562551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155725562551 - 2¹ = 155725562549 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155725562495 and 155725562504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155725562557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 779865 + ... + 958978.

Almost surely, 2^155725562551 is an apocalyptic number.

155725562551 is a deficient number, since it is larger than the sum of its proper divisors (14023866417).

155725562551 is an equidigital number, since it uses as much as digits as its factorization.

155725562551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739022 (or 1738939 counting only the distinct ones).

The product of its digits is 2625000, while the sum is 49.

The spelling of 155725562551 in words is "one hundred fifty-five billion, seven hundred twenty-five million, five hundred sixty-two thousand, five hundred fifty-one".