155801101607 has 2 divisors, whose sum is σ = 155801101608. Its totient is φ = 155801101606.

The previous prime is 155801101579. The next prime is 155801101663. The reversal of 155801101607 is 706101108551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155801101607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155801101307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77900550803 + 77900550804.

It is an arithmetic number, because the mean of its divisors is an integer number (77900550804).

Almost surely, 2^155801101607 is an apocalyptic number.

155801101607 is a deficient number, since it is larger than the sum of its proper divisors (1).

155801101607 is an equidigital number, since it uses as much as digits as its factorization.

155801101607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 35.

The spelling of 155801101607 in words is "one hundred fifty-five billion, eight hundred one million, one hundred one thousand, six hundred seven".