155503642597 has 16 divisors (see below), whose sum is σ = 164085305472. Its totient is φ = 147078866880.

The previous prime is 155503642543. The next prime is 155503642603. The reversal of 155503642597 is 795246305551.

It is a cyclic number.

It is not a de Polignac number, because 155503642597 - 2²³ = 155495253989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155503640597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1273003 + ... + 1389799.

It is an arithmetic number, because the mean of its divisors is an integer number (10255331592).

Almost surely, 2^155503642597 is an apocalyptic number.

It is an amenable number.

155503642597 is a deficient number, since it is larger than the sum of its proper divisors (8581662875).

155503642597 is a wasteful number, since it uses less digits than its factorization.

155503642597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117468.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 155503642597 in words is "one hundred fifty-five billion, five hundred three million, six hundred forty-two thousand, five hundred ninety-seven".