155387680793 has 2 divisors, whose sum is σ = 155387680794. Its totient is φ = 155387680792.

The previous prime is 155387680757. The next prime is 155387680831. The reversal of 155387680793 is 397086783551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154235281984 + 1152398809 = 392728^2 + 33947^2 .

It is a cyclic number.

It is not a de Polignac number, because 155387680793 - 2²⁴ = 155370903577 is a prime.

It is a super-2 number, since 2×155387680793² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (155387680703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77693840396 + 77693840397.

It is an arithmetic number, because the mean of its divisors is an integer number (77693840397).

Almost surely, 2^155387680793 is an apocalyptic number.

It is an amenable number.

155387680793 is a deficient number, since it is larger than the sum of its proper divisors (1).

155387680793 is an equidigital number, since it uses as much as digits as its factorization.

155387680793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38102400, while the sum is 62.

The spelling of 155387680793 in words is "one hundred fifty-five billion, three hundred eighty-seven million, six hundred eighty thousand, seven hundred ninety-three".