155601445951 has 4 divisors (see below), whose sum is σ = 177830223952. Its totient is φ = 133372667952.

The previous prime is 155601445939. The next prime is 155601445963. The reversal of 155601445951 is 159544106551.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (155601445939) and next prime (155601445963).

It is a cyclic number.

It is not a de Polignac number, because 155601445951 - 2⁵ = 155601445919 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 (155601445151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11114388990 + ... + 11114389003.

It is an arithmetic number, because the mean of its divisors is an integer number (44457555988).

Almost surely, 2^155601445951 is an apocalyptic number.

155601445951 is a deficient number, since it is larger than the sum of its proper divisors (22228778001).

155601445951 is an equidigital number, since it uses as much as digits as its factorization.

155601445951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22228778000.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 155601445951 in words is "one hundred fifty-five billion, six hundred one million, four hundred forty-five thousand, nine hundred fifty-one".