361991507923 has 4 divisors (see below), whose sum is σ = 370409915128. Its totient is φ = 353573100720.

The previous prime is 361991507897. The next prime is 361991507957. The reversal of 361991507923 is 329705199163.

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

It is a cyclic number.

It is not a de Polignac number, because 361991507923 - 2¹³ = 361991499731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361991507023) 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, 4209203538 + ... + 4209203623.

It is an arithmetic number, because the mean of its divisors is an integer number (92602478782).

Almost surely, 2^361991507923 is an apocalyptic number.

361991507923 is a deficient number, since it is larger than the sum of its proper divisors (8418407205).

361991507923 is an equidigital number, since it uses as much as digits as its factorization.

361991507923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418407204.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The spelling of 361991507923 in words is "three hundred sixty-one billion, nine hundred ninety-one million, five hundred seven thousand, nine hundred twenty-three".