16377154421 has 2 divisors, whose sum is σ = 16377154422. Its totient is φ = 16377154420.

The previous prime is 16377154411. The next prime is 16377154463. The reversal of 16377154421 is 12445177361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16253700100 + 123454321 = 127490^2 + 11111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16377154421 is a prime.

It is a super-2 number, since 2×16377154421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16377154411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8188577210 + 8188577211.

It is an arithmetic number, because the mean of its divisors is an integer number (8188577211).

Almost surely, 2^16377154421 is an apocalyptic number.

It is an amenable number.

16377154421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16377154421 is an equidigital number, since it uses as much as digits as its factorization.

16377154421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The spelling of 16377154421 in words is "sixteen billion, three hundred seventy-seven million, one hundred fifty-four thousand, four hundred twenty-one".